All this in mind, also keep in mind that you'll need somewhere to store and carry the hose when you aren't using it.
I think if I was doing what you are doing, I'd go with a Thetford Cassette toilet. Much better than a porta-potty, all self contained and the integral black tank can be dumped in a residential flush toilet, pit toilet or even in a hole dug in the ground if necessary.
They are very nice and efficient units.
That will eliminate any black tank and for grey water, you can drain that into a 5 gallon bucket and dump it in the grass.... or down the toilet if you desire.
I just eliminated all your sewer related issues.
I know for sure, my next unit will have a cassette toilet. Eliminates the 'stinking' black tank entirely.
