What kind of non-profit organization is it? What is the goal of the trip? The reason I ask if that there may be a way to tie the fundraising into what the trip is all about. Like, if you were entering a bike race or run, you could get people to sponsor you by the mile.

A girlfriend is heading to Seattle this weekend to raise money for breast cancer research. She has entered a 60-mile walk. She is sponsored by the mile. If she complete all 60 miles in 3 days, she will raise over $11,000 for her charity. It can be done!