I open trailered the car from Texas to Florida behind a truck that is lifted and has 35" tires. I put on oversized mud flaps and wrapped the front of the car (and the mirrors) with a 24" wide cling wrap bought from U-Haul. It was $25 and is enough to wrap it for several trips. Friends though it was crazy to bother, but when I got to FL I found a couple hits from rocks. No damage to the car because of about 4 layers of wrap.
Bought an enclosed trailer right after that!