Thank you for the information. I did google his video and he has some interesting points. In my case, AR requires the taxes to be paid based on the point of delivery, so I would in fact pay AR taxes on it since I'd most likely buy it here. The only real concern I had was, as you pointed out, the amount of time that I (and the vehicles) would still be lingering around (~9 months I'm estimating). I have not been successful in finding any information on what that time limit might be, or if it even exists, in AR. There is also a personal property tax in AR to consider, which could make the situation sketchy as well if I hang around too long.
Looks to be a very grey area for me at the moment. I don't want to wait until the last minute to purchase the truck/rv because I need to be using it when I move out of my house and it will take considerable time to make that happen. The old chicken/egg thing...