Get six 2x4x8 studs, four rather large carriage bolts, washers, and nuts, and four relatively small eyebolts that will go through the 2' part of the 2x4.
Also get a drill and some 1/4" spade bits.
Lay the wings on the ground upside down, and mark a couple of 2x4s so the holes will match the lift strut attach bolts, which you leave in the wing. Slide the eye bolts into where the lift struts used to go, thread them through the 2x4, and tighten with nuts and fender washers. Leave enough 2x4 hanging off the LE & TE to protect both.
Then move to the butt end, and on each wing, turn the remaining 2x4s into a giant clamp - one on top of the spar and one below it. Arrange the giant carriage bolts very close to the spars and very close to the butt rib. Tighten until you are sure the 2x4 clamp will not slide off. You could get clever and put some rope in there to ensure that it will stay on, but I have never had one fall off. The pair of 2x4s acting as a clamp should extend beyond LE & TE just like the one at the lift struts. Then you can haul the wings either vertical or horizontal. I have gone coast to coast this way with no damage. Good luck.