Ben's 100
If you really don't want mosquitoes Ben's 100 is the time proven and most potent product commercially available. It seems to be the product of choice up here in Maine for real thick mosquito areas.
I've tried a few non-deet products and some seem to actually attract them.
Nothing I have found repels mosquitoes anywhere close to the way Ben's 100 does. A littel bit goes a long way one or two drops in your palm rubbed over your entire eposed body is all you'll need.
I was in Nova Scotia and encountered the absolute thickest mosquitoes in my life. There were literally thousands attacking us. They wer so thick that if you swiped your hand at the air and made a fist in a grabbing motion you'd have at least ten+ in there when you opened it. We applied Ben's 100 and they would come within 5-6" and stop dead but would not land..
It does have deet and as Tim R. Said it eats plastics and can also ruin Gore-Tex and laminated fabrics so be very careful with it and if you have kids at least read the product warnings. Wash your hands after application to so you don't ruin a GPS screen or an ST-60 screen. My wife had a Swatch watch face that got melted by deet..
If it were me I would bring one potent product containing deet and one without so you can compare and chose the the least potent but effective formula and the one you need for the environment.
We have a couple of areas in Maine where the mosquitoes just seem to laugh at deet, or any other product fo that matter, and the only thing that works is screens....:cussing:
Ben's 100 (95% Deet) Photo courtesey Gempler's (LINK)