I live in Laramie Wyoming and got my 80s Keystone from a guy in Clifton, AZ - in the southeast part of the state. I used 2" fairly lightweight nylon strapping material and a truckers hitch to attach the existing eyebolts in the frame of the Keystone to the frame underneath the 1999 Silverado 1500 z71 8' bed. Tires were P265-70-17 - load range 113. I just replaced the shocks, and the original equipment ones were pretty shot. I picked up some Kumho Venture AT51 tires from TireRack in Denver yesterday.
I weighed the truck and camper, and then the camper, and the camper came in around 1250 lbs.
I was so trepedatious about this setup. The previous owner said he'd hauled it this way a for a year.
I drove really, really slowly for a couple hours. The truck handled well around fairly tight turns, and braking was good. I drove school bus back in the 1970s and driving the truck/camper combo felt similar. It's a style of driving. I slowly gained confidence that driving it like a school bus was working and I felt safer.
I got on I-25 and dropping down into Colorado the west wind hit me. It wasn't until I got to southern Denver that it abated from a constant 25 mph with gusts of 40 mph. By that time I felt comfortable driving at 75 mph. The side gusts rocked the rig and that was when I felt the sense of "float" and slowed down to 65 and 60 sometimes.
When I checked the camper, it had moved a couple inches backwards. No biggie, but I decided nylon straps could be improved. I got some turnbuckles off craigslist and will put those on. After the shakedown cruise, I'm not to concerned about losing the camper. The straps were about as minimum as I could get and they performed well in sketchy conditions. I think part of the success of straps was the low profile of the camper.
Jeff