Rob
Reported take off distance for AV8R is 100 ft with 16 degree flaps so hopefully you won't have any tall grass or other obstacles at the end of your 100 ft circle. I am one of the more fortunate ones to have long asphalt runways at both of the fields I have access to, so I have not used flaperons. I personally would not be able to get a jet into a 100 ft circle unless it was an EDF.

Roy