Wait, wait, how the hell are you switching your vehicle registration, drivers license, voter registration, and car insurance all over to Utah when you don't even have a permanent address in the state yet? And even if Utah law for some reason allows you to do all those things by giving them your hotel address and room number or whatev, why would you go through the time (and money) to change all those things now when you'll have to update them in a couple of weeks anyway when you find an apartment?
Probably because he wanted to "feel" like a proper Utah resident. Bushie seems to place a lot of value on meaningless stuff like that.