Unless you're planning to haul a big load on the trip home, there's no need to run dual wheels in the rear. Unloaded or lightly loaded, it will travel just as well with the rear tires singled out. If you're buying new tubeless tire rims, you'll only have to buy 4 tires and wheels, not 6, at least for right now.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!