Traveling over my spring break is probably not an option - if i were to travel i would probably go to Mexico (most of the kids from my school go to Mexico over the spring break of the senior year). I did notice that one DZ (Skydive Tecumseh) had an IAD course March 23rd of last year, so they may not be open. If however, there is nowhere open, I will delay until the summer.
As for Colorado - I'm going there over my Christmas break already, and I'm staying in vail. Not sure if it will be affordable, but where is the wind tunnel your friends work at?