In reply to mgco3:
> At one end of the cave place a large open butane gas canister
> At the other end or the cave a large lit candle
> Retire until you hear the bang
> return to boulder on warm mosquito free rock
..... lying around on the floor of the cave.
But LOL, quality answer.
Various strengths of DEET are available. We've been smothering the kids in it for six months now, and neither has had a fit yet. It works, unlike citronella. Coils are also great, but only in wind-free environments.
Martin