QUOTE(A.E.Michell @ Apr 1 2012, 12:48 PM)

We were planning on staying 3-4 nights as we are traveling far to get there form Fl. Then we are going to Cody and South Dakota after that. Would appreciate any advice on how long to stay as we like to hike and drive around..aimlessly at times! What else do RV folks do? Ha! Thanks for any help. A.E.
We visited RMNP last year at the end of June. There was still lots of snow on the ground especially where it is piled up from clearing the roads. I can't help you with specific comments on a Estes campground because we did a day trip from one of the nicer CGs in Loveland. If you want to widen your search, that's only about a 30 minute drive.
We did look around in the St Mary's Lake CG only because we went by it on the way out of RMNP. As was mentioned before, it does have varied reviews. But it did appear that the location may allow a less trafficked access to the national park.
I agree with Kirk on the time it takes to view the park. We only spent a full day there. If a modest amount of hiking is included, I suspect that one could do it all in a two day period. That would also depend on how many stops you make to take moose pictures.
I've also been to Cody and just about everywhere in the southwestern section of SD. It's purely a personal opinion, but if I were time limited, I would spend as much as possible in SW South Dakota.
Have fun.