Just stayed at Fishing Bridge for Mother's Day. It is a parking spot. No picinic tables or fire rings but full hookups (except it was getting to 20 degrees that night so they shot the water off). It looks centerally located but our family does not enjoy the lake side of the park. We prefer the upper loop. Madison Campground is nice, but no hookups. Each campground has a ranger talk at 9PM each night and typically has fun information and education for kids and adults. August will be crowded. We typically will camp in the park before schools get out in May and after school starts in September. Being that we live in Bozeman, we will do afternoon trips during the summer. Best of luck and enjoy the park!