I have visited Dunkeswell three times including an overnight stop.
Found the ops staff extremely helpful, proving tie downs for my a/c with no bother at all.
On my last two occasions I have visited at weekends, I found the service in the Cafe to be v. slow, this was due to the volume of people passing through I think, probably best to expect a while on the ground for food at the weekends here!! Food however is excellent, including the carvery.
Worth a go! Watch out for North Hill (gliders & cables) a short distance to the west especially if using the westerly runway departure!!
Picture shows departing off Northerly Rwy