Mike,
Don't let soggy canvas put you off camping - it's not really as bad as that, you know! The site at Sidmouth is pretty good for a festival site, with hot showers going 24/7 (a great place for some impromptu singing - though not recommended at 5.30am!), plentiful clean bogs, ample water (not all of it falling from the sky) and a heck of a lot better than Towersey.
Annie's Mexican food stall does an amazing heart-starter breakfast until late, with real coffee, and the craic there also goes on until the wee hours (does she never sleep?) and the Middle Bar crew are well represented (where else would you get to see Tony Day repeatedly falling off a plastic stacking chair, for heaven's sake?).
Give the Red Lion a buzz to see if they've any rooms left, certainly, but why not give camping a try for a few days at least. You never know, you may yet get to enjoy it!