Gros Ventre is close to the southern end of Grand Teton National Park entrance. It's a large mixed use campground with lots of RV and tent sites. They get busy as do all of the campgrounds in or near the park, so get there early to get a site. Even getting there at 11am, we got stuck pitching the tent on an RV loop. Sites all had fire pits and picnic tables and were level. The campground is next to the Gros Ventre River and across the street from Antelope Flats. We were duly warned about bears and food storage (keep your cooler in the car), and bison have been known to wander into the campground in the past. No showers on site, but you can visit one of the other park campgrounds or just drive into Jackson and go to the Recreation Center. For less than $10 you get a day pass that gives you access to the showers, pool, etc.