Each site is different with rocks, trees, etc in site and across from site. There is a web site that gives pictures of each site. ?worth looking at them. Sometimes you can overhang beyond end of site; others there is a tree or rock preventing that. Some sites have free access across from site allowing truck maneuvering while backing; others have tree right across preventing the truck from maneuvering while backing. Really a mixed bag there.
ditto on the charge line. You most likely have an unused wire in your umbilical cord and a charged pin on the MH connector. Just pick that up in the car connector and run a #10 or 12 wire from connector to battery positive post and put an in line fuse.