Todd, I've no experience with strap-on skegs, but you might first try shifting more gear weight to the stern. Weathercocking means that the stern is drifting downwind faster than the bow. Planting the stern a little deeper in the water, relative to the bow, may be sufficient to balance the downwind drift.

If that fails, check out this link and photo below by Duane Strosaker:
http://www.rollordrown.com/kayak/skeg.html

John