Just saw this post -
I had a similar problem with my '07 Silverado dually and Arctic Fox camper, because the eyebolt on the left rear is mounted farther forward than the one on the right. I just set the camper back 3.5" (width of a 2x4 which I use as a spacer) and wrap the eye with duct tape. I've gone about 30,000 miles with this setup (including to Alaska) with no problem.
2004 Winnebago Adventurer 35U/W22 Chassis
2004 Arctic Fox 860 on an '07 Silverado Duramax Dually