1130, is a non slide LB unit with nice counter space. I would use one with two people. It can be a little narrow at times but i think see your plan to get close ;) I hope 'GF' means girlfriend not grandfather.
I'm not sure about the OEM hitch on your truck. The 1130 has a long overhang. I think you will need to use a 36" - 48" towbar extention on your hitch.
Because my 2004 GM OEM was weak , I did change my OEM for a 2.5"x2.5" . My extension bar reduces down to 2x2 to accept standard heads and ball mounts.
Unless there are issues with your particulr hitch. The OEM hitch might work with a tow bar, towing a toad on all 4's, there is very little tongue weight. Hopefully,someone with experience in this will post that specific info. for you.
Look here for mods . 'Camper Interior', 'storage'
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/25966285.cfmYou might find some ideas here too:
http://home.comcast.net/~netboy/Good luck , have fun,
Bob