My low-tech deterrent? A lifetime of avoiding deterrents. My body seems to have developed a natural resistance to them.
I grew up in New Hampshire, not exactly as extreme as Alaska but a place where there are certainly plenty of mosquitos in the summer. I went camping a few weekends ago in the White Mountains and had 10 mosquitos biting my arm as soon as I stopped moving.
So what's my deterrent? My body. It seems to have developed a natural resistance to mosquitos, or at least to what they inject into me.
When mosquitos bite me, I genuinely don't get itchy or have "bug bites". If I remember correctly, the itchy welts that most people get are caused by the body's response to something the mosquito injects into your skin to prevent the blood from clotting. My body seems to have adapted in such a way that it doesn't react anymore.
I haven't always been this way. When I was little, I got mosquito bites just like everybody else. The difference was, I always refused bug spray (I hate chemicals on my skin). I don't care how bad the bugs are. If it's 100F outside, I'll wear a long-sleeve shirt and long pants to cover my skin (and yes, they still bite through, so heavy clothes help).
EDIT: Also relevant: my grandmother discovered that dryer sheets--those scented things that people throw in the dryer with their laundry--work as an excellent mosquito deterrent. I didn't believe her until I tried it. Hang one out of your hat or on your shirt collar and watch how few mosquitos come near your head!