There are a bunch of us that will be camping at Forestville/Mystery Cave State Park in South Eastern Minnesota on 16-18 April:
http://www.dnr.state.mn.us/state_parks/forestville_mystery_cave/index.html
So far there is going to be 1 tent and 7 Teardrops attending. Everyone is welcome to come. The more the merrier! (Did I spell merrier right?)