If you've got enough rubber bands onto keep the wing from shifting in flight... it won't allow movement any quicker than the dual nylon bolts.

You can improve the wing release with the bolts in event of a crash... fill the space between the ut plate and the bottom of the wing with soft balsa (remember the aileron torque rods...) and cap that with 1/32 aircraft ply, in a manner to have the ply rest flush with the bottom of the wing with it properly bolted down. In event of a crash...the ply will act as a knife and cut the bolts. In normal flight, its dull enough to not even wear a groove in the bolts if the wing is tightened properly.

NOTHING yu do will prevent all crash damage though. Build it to fly... not to crash.