You will be spending a lot of money. I expect that there will still be hole for a vent if you delele the AC. You probably don’t know if you’ll end up hanging out at Okanogan, etc or not when the weather turns unnormally hot. I’d get the AC, but do get the low profile model which is quite a lot shorter in height.
We don’t use our AC a lot, but I do remember stoppping near Yellowstone and on one of those hot nights it was 95 F at dark. Obviously, just a fan would have never cooled off for sleep.
Fyi, I got my first TC, but not first RV almost 15 years ago. A lot has changed including the truck, but I still have the same TC. So, I’d say buy an AC to future proof the rig.