We are traveling to Alaska in our 5th wheel in August and September. We will be leaving from Whitefish, MT the last week of July. Is this too late to start our adventure? Our current itinerary is week 1 - Banff, Jasper, week 2 - Grand Prairie to Whitehorse, week 3,4 - Haines, Chicken and Valdez, week 5 - Seward, Homer (end of August), week 6 Denali, week 7 Chena/Fairbanks, week 8, 9 - Steward, Prince George. We would like to take a glacier cruise, flight-seeing around Denali, flight to Katmai, just to name a few. We enjoy hiking and being outdoors.