What is a good brand base-camp cot that won't stretch and sag in the middle after a few nights or 1 season? Myself and most of the people I camp with are getting older and all the cots we have used over the last few years sag in the middle after just a few nights or just one hunting season. It makes it hard to get in and out of the cot. Plus it is very uncontolble sitting on the edge while putting on socks & boots.