Throw a Stick of Sage into the Firepit/Bonfire. The sage scented smoke that the fire will emit keeps mosquitos and other annoying bugs at bay for the entire area. Usually the sage stick is enough, no need for bug sprays.
It is called the swedish fire log. pour and soak for a few days or weeks. then when you need it start it on fire and you have a fire log that last for hours. we did this in the snow when we had parties or people over to keep warm.