Bolt Head (Salcombe) is a good strip (620m) though possibly subject to the weather vagaries of a clifftop location. It looks to be closest available strip.
Halwell is 480m and therefore not suitable for many. Also it appears to have a planning restriction of 100 h.p. maximum.
Brent Tor (Dartmoor Gliding Club) is longer but is subject to restrictions on powered aircraft due to its location in the Dartmoor National Park, so is unlikely to be available.
Exeter is not cheap - worth checking on the landing and handling charges and the fuel prices before committing.
