We use "AfterBite" the "The Itch Eraser". It comes in a small, easily packable, tube, with a wet-tip applicator. And...it really works. The active ingredient is ammonia, in a non-medicinal oil base.
BTW, the mozzies are out in the Eastern Sierra, but not as bad as some years. There isn't as much standing water, because of the very low snow pack this year.