I had to buy some new ramps when some neighborhood hoodlums liberated the ramps off my trailer. I got the 6 foot long version of these:
5,000 lb Per Axle Hook End Truck Trailer Ramps | Discount Ramps
So much easier to handle and deal with. I don't normally store them on the trailer and just toss them in the back of the truck, but I'll have to figgure something else out now that I bought a suburban - they're just about 6 inches too long to fit behind the second row seats...