We have several products from latimat and they work well. Just make sure if you get the large drive on mat to get the reel to make life easier. I would do a lot of research before making such an investment I don't know how they stand up to gravel though, I would never set any of ours up on gravel.

Eric R Fisher
Director of Operations
JWS Service Systems, Inc.
www.jwsservicesystems.com