My wife has a show in a gallery in May. Afterwards we are tentatively thinking of heading north through northern BC and the Yukon. Then taking the ferry from Prince Rupert to Port Hardy and then mosey...
For whatever it's worth, we once did a bike tour from Anchorage to Denali to Glenallen to Valdez in late July/early August and had no problems with bugs. But that could have been an exceptional year.