I used to go to this one as a child; then took my kids up there years ago; then again to get Dave up there. We spent the night on a weeknight. The door says first come first served, but several arrived in the middle of the night after we were sleeping and proceeded to make a ton of noise and finally quieted and slept in structure with us, but it was a rather awful experience. We believed that after 10 p.m., no-one else would come. Be warned!