AppleMacster - The Old Mill is nice, although it is part of a chain. However, it would be about 20-30 min walk from the GA terminal. No problem for a hardened mountaineer like myself, but your average PPL who complains about having to walk more than 2 min to the a/c might have more issues.
SaadBast... - Coventry has been done for a bash a couple of years ago, but not for a fly-in. A fly-in would be good there, but later in the year when the weather is more picnic-friendly.