We have two options of when to go for 10 days. We can go the second week of July or the second week of August. It sounds like both weeks are likey to be rainy and crowded. We want to spend 2 days in each area - Anchorage, Seward, Fairbanks and Denali. I'm most concerned about rain in Denali and roughness of the waters in Seward. Are there more advantages to going in July or August?