One summer when I was working in Alaska with the US Geological Survey, my partner and I had a large bull moose wander through camp one night. He tangled himself in our tent stake ropes, pulling the stakes out of the ground. The tent collapsed on us. The Moose thrashed around, finally freed himself and wandered off with one of our tent stake ropes still in his antlers. I would still recommend a tent to keep out the rain, insects, creepy crawlers and small mammals. Even the big critters will usually detour around a tent unless you have been careless and have left food scent inside. A tent is worth the extra weight.