If you have any control over your arrival date, get it as early in the season as you can. We were there the first week of June in a rather dry year and had no trouble getting spots inside and outside the park. The posters above have some great inside knowledge I do not possess. When we were perusing maps and guidebooks about YELL, I spied Slough Creek, down a dirt road to a small no-provisions campground in the northern section of the park. Ah, just the thing for an XTC. Not so, Bison breath. The whole off-road community was there, and this was after fording a couple small creeks. Seems a lot of people had the same idea. We stayed at Henry's Lake State Park on a cool, windy June 1st. About 15% occupancy.
Also at Bridge Bay which was about 75% occupied, but easy to get a site.
Also atop a knoll opposite the G.T.'s up I think it was up Pacific Creek and dispersed camped on F.S. jurisdiction up a rutted dirt road dodging the herds of Bison. The year was 2008, I believe.
With the PBS series on National Parks playing over and over again, the pressure on all N.P.'s should be horrendous.
jefe
