You probably know this already but Perranporth & Truro airfields would probably be the closest licensed fields (about 9 miles away by road)
Perranporth 01872 552266 Truro 01872 560488
Tehidy Golf Club might also be worth a try as they are only a couple of miles away. 01209 842208
Failing that there is also the Aviary Court Hotel
http://www.aviarycourthotel.co.uk/index.html I seem to recall them taking helicopters before.
Hope this helps!