Don't be dissuaded about riding your bikes up the Dalton. I ran the dorms at the U. in Fairbanks for many years. Saw 350-400 bikes a year stay on campus and most were headed to Prudhoe. Harley baggers, Goldwings, Honda Rebel 250, Yamaha R1 and a Vespa with two 70 year old grandmas; all made it up and back. Just make sure you know your bike's and your own limitations, ride slow when slow is needed and keep your wits about you and you'll be okay.
Get the most aggressive tires you can find. No need to haul a tire up the Dalton as depicted above, but make sure you can fix a flat. Make sure your chains are in good shape.