Sounds pretty ambitiuos. Are you big "Ice Road Truckers" fans or something? I've been about 3 miles on the Dalton before having to turn back (and expecting to) with a sedan that clearly wasn't matched to it - I just wanted to see the Elliott and how far the initial pavement went (not far).

I'm not even sure the major agencies allow it in their contracts with their SUVs...IIRC you had to go with a local company specializing in that. Though that might be dated. As mentioned, supply/demand could especially be a bear this year.