We're picking up a 200 pound hog on Sunday. The problem is how to load her. The truck bed is about 3' off the ground, so we'll either need a very long or very steep ramp. How do I construct one on the cheap? I have some plywood scraps, barn boards, pallets, etc.-plenty of wood. How steep a ramp can she negotiate easily? How high do the sides of the ramp need to be to prevent her from jumping? Any help you can give would be appreciated.