Every time my kids went on camp, I bought yellow wristbands for them (rubber)
Those wristbands are impregnated with mosquito repellent.
They were wearing this the whole week, and all mosquitos stayed away from my kids!
You can buy these bands over the country in pharmacys. Maybe this also exists in the USA ??

when I get bitten by mosquitos, I put on some white vinger on the woud; No more itching!!