Although it seems like this would stress the jacks , it looks like this guy built a track. Maybe you could hire him and sip a beer while he works. :)
http://www.youtube.com/watch?v=sZqVF4mb0aYWhen i moved sheds i used heavy 6" pvc tubes under the shed and rolled them on uneven lawns. I used an 8 ft length of 2x4 as a lever to move them.
You would angle them on a 45 to make a turn. I used 3 or 4 and just kept rotating them where i needed them.
Maybe after you back the camper in , you could remove the wheels and let the pvc move the camper sideways. A floorjack is all you need to do the lifting.