Royal military canal walk for parkinson's

Hi friends and family, on my birthday this year I am aiming to walk most of the royal military canal ending up in Bislington, in aid of Parkinson's, me and a few others will be walking 20 miles to try and raise a few pounds for various charities, I have chosen parkinson's as unfortunately in recent times I have become more aware of the unpleasant affects this disease can bring. I have been realistic with my financial target (but not so with my ability to walk 20 miles!) so please please help me surpass it. Thank all you lovely people in advance for your support.