I researched mosquito traps & repellants recently. We've had an incredibly wet Spring/early Summer, and with the end of the rains come the mosquitoes. I found a garlic oil spray ( concentrate) that does a pretty darn good job of keeping them at bay. I might get a bite (or three), without DEET, rather than a dozen. DEET works, but you know - YUK.
There is a strong garlic odor while spraying ( it's 99%+ garlic oil) which dissipates after about 20 minutes. It is applied with a common pump up weed sprayer. It costs about $35/qt, shipped, and one good dose around the lot lasts ~ 2-3 weeks, and costs about $4-$5 per treatment.
I'd "recommend it to a friend". I'll be buying the gallon size when the quart is gone.