well there will be a load of hotels around the area. i dont think you should worry about booking asap as they will never all fill up.
if its a wedding, how come you are looking for a cheap(ish) hotel? surely, you pay for what you get? marriages dont come around very often. push the boat out and book a room at a hilton or something!!!
but try this...
http://www.folkestone-hotels-guide.co.uk/
just did a search on yahoo! and there you go
