Did a cruise and a landtour in June and agree with others on this board. No problem at all with insects while on the cruise, but lots of mosquitos in the interior. Terrible in Fairbanks and Talkeetna. Used lotion type mosquito repellant. Worked well. Forgot to reapply it one afternoon, however, and was bitten so badly on my ankel that it took about 2 weeks to go down and left a scar about the size of a quarter. My suggestion would be to use your repellant liberally and frequently when in the interior.