Check out Bear Canyon Campground- Might be a little more quiet- For s a couple of good hikes, hike up to Sacagwea in Bozeman, or try the Sunlight Basin trail out of Wilsal in the Crazy Mountains
Those are good suggsestions. There are plenty of options in Gallatin Canyon as well though most get pretty busy on the weekends. Get up high in almost any drainage and the views are great. Devil's Backbone between Hyalite lake and Windy pass is neat country and will have almost no one on it. Don't know how ambitious of a hike you're after but there are plenty of every kind. Tom Miner near Gardiner is neat too, with trailer access and some good jumping off points.
