As you can tell by the few posts already, it's a mixed bag of ideas. The final decision has to be your's. But here's what you need to consider buying one and using it, vs never having one:
1. How big are your holding tanks and how often do they need to be emptied?
2. What type of RV do you have?
3. What type of camping to you primarily do and how long?
If you only camp at places with full hook-up, you will never need a tote. You can empty your tanks right at your campsite.
If you do not have full hook-up, and if your tanks are smaller (under 30 gallons... like mine), then the need to dump will be greater for longer stays. Once they are filled up, you'll need to dump them. So now, you have 2 options:
1) break camp and move your camper .... whatever kind it is ... to the dump station and drain your tanks. Once done, they you go back to your campsite and have to set-up all over again. That may mean going through the entire process of leveling the camper again, putting down the stabilizer jacks, setting up your television satellite system again or cranking up again your batwing antenna, reconnecting your power, water if available, and extending your awning again.
or
2) use a tote, drain your tanks and cart it to the dump station. Depending upon how often you do this, and how big your tote is, and how big your holding tanks are, it may take a couple or 3 trips. But which is easier? Dragging a tote every other day, or breaking camp every other day? YOU have to decide this.
Here are some things you need to consider if you decide to get a tote.
If you can find a tote that has more capacity than your black holding tank, get it! Nothing is worse than having a tote that is smaller than your black tank and you over flow the black tank. If the volume of tote is bigger than the black tank, you will never over flow it and have to experience cleaning up a very nasty mess.
There are many who say a larger tank is too heavy. The fact is, the larger ones all have wheels. And, unless you are parked in sand on a beach, you will probably be able to pull it (even a 42 gallon tank) by hand. If you find yourself down hill from the road, (or on sand), it is very easy to simply tie a rope to the tote handle and tie the other end to the hitch of your truck and pull the tote up to the road. I've done this a couple times in the last 15 years when the ground was extremely muddy after a very heavy rain and the mud was just too much to pull through by hand. It worked, was very simple, and I didn't have to break camp.
Next, the handle of the tote (those with wheels), fit over the ball of your hitch on your tow vehicle and then to tow it to the dump station. It's NOT like you have to pull the thing a half mile by hand! Shoot NO! Let your vehicle do the work. That's why the handles are designed the way they are.
Cleanliness and smell? If you rinse it at the dump station, they never smell... simple! Enough said! I've had the same (and only) tote for about 15 years now, and it does not have smells at all. I used it last night even.
Traveling with the tote? Don't know what kind of configuration you have, but I carry mine in the back of the pick-up truck. My truck has a shell, and it rides very nice there. There again, it's always rinsed, inside and out, and never smells.
Here are some things you need to watch for with your selection of totes. Water always runs down hill. If the top of the tote is higher than the bottom of your sewer outlet on your camper, you are going to have a difficult time draining your tanks. Not impossible, just a bit more difficult. The tanks in the camper ARE going to be higher than the tote, but the outlet may be lower. When this happens, you just learn how to lift the hose and drain the last bit out of it. So you want good connections at the trailer and on the tote.
I have found there are two kinds of totes. Those that load from the top and empty from the bottom (like Barker) and those that load and empty from the same place (Thetford). My in-laws purchased a Thetford and I hated it. It loaded from the bottom with a hose permanently attached. When the hose tipped to the ground, it immediately ran and made a mess, but that's how it had to be unloaded (nasty!). The Barker has a slide valve. You attach the hose, and then pull the valve and let it drain.
One thing you DO NOT want to get is one of those smaller 15 gallon type totes that do not have wheel and you have to pick them up. Those ARE heavy! And even if you get the type that has only 2 wheels, you STILL have to lift one end to move it and that CAN get heavy. On 4 wheels, there's NO lifting anything, just pull it.
I use my tote at home too. Because we park the camper in the drive way, and do not have a sewer hook up for the camper, I empty my tanks in the tote and dump in my septic tank. The cover on my septic tank is removable. I can pull the tote with my riding lawn mower. It works great this way.
One more thing to consider. If you slip the handle over your tow vehicle hitch ball, the handle can flip off. I found an easy solution for that, and I've never lost the tote, and it's been towed well over a thousand miles in the last 15 years from campground to dump stations.
These are the things you need to consider. The biggest factor being... do you want to break camp to empty your tanks or not?