Got to go with the pattern plane route. It is not as much size, weight or wing loading as you would think. I have found that airfoil and plane design have more to do with it than size. I have a 25 size pattern plane, old school tapered LE, with a very thin airfoil that I routinely fly when all the giant scale planes are being put up at the field. It flys better in the wind than my larger, newer style pattern planes. I also have 1/2A planes patterned after old pattern planes that I think nothing of flying in a 20mph wind. Thin airfoil, swept leading edge, clean lines with enough motor and the wind becomes a non issue. Unless you get it too light. But any wing loading over 20 is fine.