For one, there is no camping at Lone Pine Lake.
There is NO FEE to park you vehicle. Just be sure you don't park in the DAY USE ONLY (near the falls).
As for the marmot threat, don't leave your tent and sleeping bag open. Marmots like to stay warm, too. You don't want a "warm fuzzy." They can also rip your sleeping bag to shreds just to get at the filling for their own personal use. Just don't eat in your tent and pack all scented items in your bear locker. Using rocks to secure your tent is a good idea.
As for the skeeters, I think they migrate from Alaska or Minnesota. Yes, they will be present at the lower elevations -- "green zone" (vegetation).
