If you can't borrow or rent some wheels, you may purchase a cheep Chinese made set ($300.00ish) and see how they feel. If you like them, you have a decent backup set, or could sell them and probably get your money back.

I weight over 200 and get blown around on 50's.... can't imagine it at 100 pounds. You may be better off with a lightweight, shallower rim, but that's just my 2 cents.