I built a set of chocks similar to what d88rox is using, cost next to nothing and they work at least as good as the expensive ones at the r.v. shops. I would recommend using two just in case you're not setting good and level or a real strong wind comes through and tries to spin you. It'll probably never happen but why take a chance. Once would be more than enough. And I have a question why all of a sudden can't I get any pictures that are posted, I'm more or less just guessing what a lot of things look like? This started about the beginning of the week, has anything been changed on the site. Sorry for jumping in on this but it would be nice to see what we're talking about.