Thanks for more ideas...
I thought about the boot seal/innertube thingy, but the canopy is not insulated at all, and I just don't think the A/C would get to be that effective back there. There are bulky a/c vent hoses that can divert it back to a kennel, but when we're gonna have three adults filling the cab, I can't see a hose traversing the cab as anything but a severe buzzkill.
Yeah, I'd thought about the crazy creek. That'll probably be in our arsenal, along with maybe a folded paco pad and/or a couple thermarests. We'll give him a few Disney movies on the laptop to keep him quiet.
I'm actually leaning towards draping a burlap sack or something similar in the canopy, in front of the front window, so then wind entering will pass through, and periodically opening the cab window and shooting a spray bottle back to wet it down and/or wet down the dogs, too. Might have to take a test ride with the radiating beds and the swamp cooler thingy. I suppose we'll make it work somehow.
@ miller time: Yes, I know my priorities. But sometimes the humans have to take precedence.
@wildh2o: I'd actually considered riding in back myself with the coolers. Most days I feel like the dog of the family anyway
@sarakonamojo: Good ideas for the back, we're all pretty tight, so we can be flexible with trading off positions. I've done the drive multiple times, and I'm gonna try to time it so the hot Utah/Nevada stretches are in the evening/morning. Those ruffwear coats look cool, literally.
@cataraftgirl: You have fun on the Rogue, too. We're putting on on the 21st. It'll be a return to my home river for me. And the next time we do this, it'll be in a doublecab Tacoma with plenty o' room up front.
Thanks again for all the helpful advice!