What about doing a coast to coast challenge or perhaps Accrington to Torquay for next season's away fixture in a tuk-tuk?
Sponsored so it would raise money, could have a seperate competition to win prizes for the exact mileage covered and raise money with that as well?
Plan the route to cover local radio stations and other media outlets to highlight what was being undertook and for what reason, set up the sponsored part through just giving so then the more that hear about the more people can donate, could maybe even have a daily blog for people to follow the progress of the trek
Would take perhaps a fair bit of planning particulary in locating a tuk-tuk or something similar, but in terms of Google Page Ranking and raising money could be a Winner