Rich and I will be there because it's part of the Somerset Series, plus it's a club outing so there will be loads of us Hogweed Trotters there.
We've not done it before either though, so can't answer with too much conviction. I understand that it is pretty flat, and there is a fair amount off road, including beach.
We're coming down from Bristol so I can't say how you'd get up there from Exeter, particularly on a Sunday. Can't you get another runner with a car to go
It's run by Burnham Harriers and I've found this snippet of information:
Organised by the Burnham Harriers this is a 13.1 mile route on a fast flat course around Burnham, Brent Knoll, Lympsham and Berrow. For further information and registration forms please ring 01934 732310