Here is a screwy idea.
Make a huge subframe for the Front & Rear beam with the trampoline attached to side rails. Then have four quick release pins at each corner and a few for the side rails. Trailer the subframe vertically. So the question is what is the minimun Federal Bridge Clearance height. (smells like a H16 tramp on Sterods). The additional price(vs indus Std) to pay would the weight of the siderails, and indentation tooling to the inside shear.