Reality - what would really help that page is an explanation of the charity effort you're supporting and maybe a bit about yourselves. Folk cough up more when the page is more personalised. That standard spiel provided by JustGiving won't cut it on it's own!
HTH and good luck. It sounds like summat I ought to enter. I'm just wondering if Gorionine would do it with me!
Go Reality - it's a ruddy long walk though - blister plasters and a rucksack full of chocolate. Oh and some amazing tunes on your ipod. Blackberry so you can update us all the route. And clean knickers. Never leave home without clean knickers