Just to add a little more on the weather. I just started reading the throw-a-way papers i picked up along the way on my trip in June. One is the "Dalton Hiway Visitor Guide" put out by the BLM. It states the best time to do the Dalton is in JUNE/JULY but rains are frequent throughout the summer. Early summer between Fairbanks and Yukon River Camp can bring lightening and sudden squalls. It says the skeets will be out in force by mid June but plenty of wildflowers during this time. This little paper is very informative. Maybe you can request a copy from the BLM in Fairbanks? Good luck on your trip. You will have a great time no matter what the weather.