hermy wrote:
We usually spend a week or so in Yellowstone in September. We stay at Mammoth which is "first come first served". We have always been able to find a suitable site there but you need to arrive between 9 and 10 AM. There are no hookups but there are water spigots here and there. Park your rig and tour with your toad.
Yep, that's the way we've done it several times in the past. We've had "self contained" units now for well over 25 years so, parking/camping in the campgrounds without hookups is very pleasant to us. The prime reason is, "SEPERATION". I don't like hearing our next door neighbor burp or f..t or anything else 'cause they're too close to us.
Many of those camp grounds in Yellowstone are non-hookup units and we've stay in just about all of them. We drove through Fishing Bridge and, well, many of the RVs were so close, you could not walk between the back to back units. NOT FOR US!
Now, as has been stated, Yellowstone is BIG! Even if you're not into too much hiking, the little "walking" trails", board walks etc. are fairly lengthy. Most are not hard or steep or, difficult in any way, just long. But, EVERY INCH of Yellowstone is interesting. Every little pool, steamer, geyser, trickle of hot water, landscaping, animal, is prime viewing that you most likely would not see any other place in the USA.
So, while you've received good advice, one more tid-bit of it won't hurt. Park or camp in one end of it, pick your campground. But, like hermy said, "first come first served" is very important. We've NEVER BEEN SHUT OUT. We've always got a spot. There's enough "turn-over" each day that, I've never seen anyone shut out. Then, take a minimum of one to two days to explore that end of the park. Then, move to the other end of the park. Maybe Grizzly RV in the town of West Yellowstone, and then take a day or two to visit that end of the park. Heck, I can spend even hours at one spot, because many are so nice. It's beautiful place, with tons to see and do. Please take your time and enjoy it.
Scott