Sept. 2010 camped at Grant Village for 9 nights, nice place but too far south for me. June 2011 stayed at a cabin at Canyon Village for 6 days, much better since it is more central. I wanted to photograph wildlife and that was ideal for a base. This was late June and they still had to close the east entrance a couple of times due to snow on the road (slides down the mountains). The road to the NE entrance got washed out by the Lamar River so that put an end to going out that way for the Beartooth highway. If you go in May be prepared for that sort of thing. On the plus side we saw lots of bears, black and Grizzly, with & with out cubs. They were all hungry and caused some jams. We were up and out of the cabin by about 5:30 am each day and got to see some before everyone else was up and about. We did go out the west entrance one day to West Yellowstone, fun place to visit.
In the park Fishing Bridge is the only one with hookups, you have to tote water at the others and use
solar or
generator to charge your
battery. They do all have dump stations, toilets and showers & launrdries (coin operated).
I'm heading back this coming June and have already made reservations at Canyon Village campground. Will go from there down to the Tetons (probably Gros Ventre campground).
Obey the speed limits in the parks and be very careful. Some of the animals there are big and they can be right in the road or next to it and they have the right of way. One early morning in June we were headed south along Yellowstone lake and a big Grizzly boar ran out of the woods and crossed the road right in front of us. I hit the
brakes and waited a few minutes. He stopped in the grove to my left and then he walked back across the road into the woods, as he crossed he looked right at the car. I was taking photos through the windshield. You just never know what might come out of the woods!