Good luck on your trip, that's a great looking rig. We did the trip NC coast to AK in 2013 in our DP without a toad and took 11 days up and 9 down with 10+ days in AK. Great trip, we stopped at Custer's battlefield, Mt Rushmore and Yellowstone along the way. 40 days is plenty of time, as the journey is also part of the trip. I was the only driver with a wife and 5 kids, everyone is still talking about the adventure. My biggest recommendation is to go charter halibut fishing in Homer; half day trips are closer and cheaper, and everyone onboard caught 15-20 halibut 15+lbs each(you can only keep 2) you'll never look at fishing the same again.