For larger planes that sit on their wheels, a lot of guys at my club have simple wood wheel-chock sets. Basically you just need 4 triangles cut from a 2x4, and some scrap to connect them. Basically, you want to do something that looks like this (pardon the ascii art):

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Where the wheel sits between the two triangles. Just that is often enough to keep a plane from rolling around.

I've actually used clothspins clipped to a wheel to keep a plane from rolling.

Usually I put something heavy against the wheel, and call it good.

For the wings, I have some bungee cords run between the handles in the back of my van.