It all depends on the location, time of year, etc. Years ago we took a trip to the interior in late August and saw first hand why locals joke about the mosquito being the state bird. Two years ago we cruised in late July and had repellant wipes with us at all times, but never used them. Our excursions included whale watching / Mendenhall glacier in Juneau, float plane to Neets Bay out of Ketchikan and a ride up a mountain on 4 x 4's in Skagway. My son and I are usually mosquito magnets, and neither of us received a bite the entire trip. Still, if we go back (oh yeah we will!) I'll still throw a few wipes in the backpack. Better safe than sorry!!