You can use a ditch. Out here in the hinterlands we use alot redneck ingenuity. Having a truck is alot easier to load them. You can use a wooden ramp but 2x4s can be hard to get the bike up. I would use a 2x6 or bigger so you have a greater chance of the bike not slipping off. make sure the one end is secure by putting it in the ground or using your foot atleast. You could always buy ramps aswell. lol