A lot of LD'ers tow a vehicle behind them and are concerned about damage to the "toad" from dirt and rocks kicked up by the LD. Without any sort of protection, you are likely to find small pits, dings and scrapes in the bumper and hood of the
Solid rubber shield mounted beneath rear bumper
"Hula skirt" mounted beneath rear
Rubber strip-style shield mounted beneath rear bumper
Shield mounted on towbar or front bumper of "toad"
Vinyl car protector
Protect-A-Tow tow-bar mounted shield
Truck-style flaps mounted on Lazy Daze, showing the metal reinforcement inside the storage compartment
If you use a mudflap or similar device ("hula skirt," etc.), be very certain that it won't drag on the ground when the front of the rig goes over a hump or the rear hits a depression in the road. If it does, it will kick up stones and throw them at your toad. The further the flap/skirt is from the rear axle, the more likely this is to occur.
For behind-the-wheels mud-flaps, owners have used truck-style heavy rubber flaps. They may need to be cut down a bit to properly fit. Be sure to use stainless steel screws when mounting them.
If you're looking for some heavy material with which to make some custom size mud flaps, here's a suggestion: A local big truck dealer often has take-off flaps that they pile up for recycling. These are ones that are used by the transport company when they deliver new trucks from the factory, or removed when a dealer installs his own name branded flaps. A chat with the service manager may be all it takes.
Another possible source for truck flaps is an unclaimed freight store, where one LD'er found some for $5.00 apiece. Might look in surplus junk store also. The hardware to mount them will definitely cost a lot more than the flaps.
Revised 29 Nov 2011