Thanks for all the insight. I finally made time for the alignment appointment last night. The guy at Schwabbies took extra time and let me hang around during the process (besides I don't let them have my keys)
Turns out that everything was right on, with the exception of a slight toeout condition. He corrected that and chatted a few minutes while poking around under the rig, while it was up on the lift. Everything looked good under there!
He says I probably just hit a chuck hole right after the tire rotation???
Anyway, the vehicle does feel way more free to roll (a coasting feeling), that hasn't been there before, but still does some sqirming on a bad road. I'll get more experince with it on my trip this weekend. My gut feeling is that it needed an alignment and when the tires were rotated they are not happy either, which caused a couple problems. Anyway, with the rebalance of a "hopping" tire and an alignment... We'll see after my little road trip.