I backpacked the IAT with a group and we camped for the night at Mauthe Lake at the beginning of April. There are lots of downed trees at the campground, which sort of detracted from the landscape (tornado damage, I'm told). Pit toilets were open, but water had not yet been turned on so be prepared to filter if you go this early in the season. We perused different sites/loops for a while to find adjacent non-electric sites large enough for multiple tents at each and were able to fit 8-9 (small backpacking) tents between 314 and 313.