Take a gravel road to Lily Lake off the southern end of Beartooth Hwy. It's easily accessible by 2wd and RV, but if you'd like to go towards Crazy Lakes (few more large spots there) more clearance is nice to have (some rocks and ruts). Camping spots start well ahead of the lake, some by the edge of forest, some more open but with beautiful views on Abasoka range on one side and Beartooth on the other. Primitive camping only. Watch fire restrictions, if allowed then there are some rock rings created already. I was there in September 2020 and the colours of autumn (aspens) were stunning with the high mountains in the distance. Loved it. Frequent grizzly area so nat'l forests warnings about proper food storage.