Used carpenter's level with truck sitting same as in OP photo. Confirmed the front of the truck is leaning to the right a bit while the camper is leaning to the left a bit. It was level front to back (on the left side anyway). Same as the camper bubbles say roughly.
(If you ever tried to put bubbles on an RV you know RVs are not built they way they ought to be, so if one place is level another place is off. I picked near the stove top for setting the bubbles outside, and that's that)
OK, so as suggested I drove back off the one ramp front left. Now the camper and truck were aligned above the cab--no twist. (Sorry, Chubby Checker!) Camper was low on the left and low to the front.
This time I used one ramp at the back left tire and the camper was level sideways, but even lower to the front. Still even up front no twist.
Put two more ramps down in front--had to try a couple times to get them the right distance out front of the tires so the front of the truck got to the proper height while the back rode up to its proper height on the left rear-- and Ta Da! The camper bubbles are good both ways and the truck is not twisted it seems.
I suppose the back right and left are not the same on their springs, no idea. That's as good as it is going to get.
Thanks very much for all the good advice everyone! :)