Hi Ben: don't think there is a practical way of doing that sealed, unsealed aileron experiment as you suggest. Have attached the sketch of relative positions of wing trailing edge and suspended aileron as shown in the picture below. The aileron pivots about its leading edge so to bridge or seal the gap would require a vertical piece of tape or covering that would attach to the leading edge of the aileron. This vertical wall of fabric would then create a large flat plate drag increase
particularly if it attached to the wing trailing edge. Fairing the covering in by attaching to the wing underside farther forward of the trailing edge would create a "suction" pocket on the backside, again increasing drag as I see it. In any case with 2 ft. of snow on the ground and temperatures at 0 to 15F daily, not a good time to be flying.