We have the same problem when chopping pork outside, but have learned to sprinkle some peppermint extract/flavoring around the area and it keeps the flies and bees away.
CMJ - KCBS
CBJ - MBN, NCBS, NCPC
OBJ - BBQCritic.com
CTC - KCBS
Pitmaster and chef - "4 Lil' Pigs" Competition BBQ Team
Author of "A 'Q' Review"
Lang Hybrid Smoker, BDS, Holland "Epic"