JoshCube,
Four Jeffrey is a good choice.You can reserve a spot along the creek,shower at the Bishop Creek Lodge,along with food,supplies and a bar.Same at Rock Creek.Convict Lake has a nice campground,showers at the resort,and also a great restaurant.All around Mammoth and June Lakes for camping,supplies and showers.One of my favorites is Trumbull Lake for camping.Killer campground with a great lake.Its right next to Virginia Lakes Resort which also has a restaurant and showers.I camp,hike and fish from Lone Pine to Bridgeport regularly for the last 30 years,have written many articles and enjoy it a great deal.You could rent a cabin a many of these locations pretty reasonably and have all of the comfort of home with all the beauty that surrounds you.