Minimizing the target area is my method. I have a hooded sweatshirt that I wear a lot, I just pull the hood up to keep 'em off my neck. I prefer not to use repellants, for fear that I'll pick up some greasy residue on my fingers and guck up an EP or something.
-------------------- Antares/Vixen 812 120mm f/8 on reworked CG-5,
Celestron/Vixen C-80 80mm f/11 on Polaris,
Sears/Towa 60mm f/15 on reworked Towa,
assorted Ultrascopics and Orthos
homemade tripods, chairs, EP cases, observatory