Grrr... histamines!

I (luckily) do not experience food or airborne allergies, but I do have a very strong allergic reaction to bug bites! For example, if I sit out barbequeing this weekend, I will first attract all of the mosquitoes to me, and will end up with numerous very swollen, very itchy bites. My question is two pronged:

First- does anyone know of anything I can do to make myself not be such a tastey feast to these critters? Dietary, aromatherapy, anything!

Secondly- if I do get bitten, what can I do to reduce the histamine reaction? Homeopathically or anything!

Thank you very much in advance!