What do you use? What works the best?
A cheap tarp is tough to beat in the gravel driveway, or offroad, but what do you use for the "real" wrenching?
I have had one of those old wooden creepers with the hard plastic wheels cocked on a 45. No frills small 2" square by 6" long pad for the head. It is made from oak 1x2's and 1/4" plywood.
It has worked OK for less than daily use on a smooth surface at home, but recently one of the wheels disintegrated. I repaired it with an old steel wheel take off from the shop, but it is just not the same.
At work I have three creepers. One was built much the same as the one I described above with the addition of a head rest that would raise. That didn't work very well, was awkward and was disassembled for parts. I covered 3/4" ply wood with a rubber belted cover, added 2" rubber wheels and made it a creeper for use outdoors on the steam cleaners pad.
The second was a lowrider creeper with straight up 2" nylon wheels. It has been patched together several times and has a nice 2"x6"x8" head rest. It is the rough bay creeper and after upgrading to rubber wheels works pretty well.
The third is one of those low rider creepers made from 1/2" tubing. It has the whole back padded and a nice size head rest. It is used on the smooth bay floors only. Not too bad, but still tends to hang on small debris.
I have used the plastic creepers in the past. Specifically one from MAC tools. I had trouble with it flexing too much, and getting hung up on a stray wrench.
My next one is going to be one of the Dog Bone Rough Riders. It is a big investment for a creeper, but I have wanted to try one for a long time.
If all goes well this thing will scoot across the garage, carport, and out through the gravel driveway
I too have left over carpet under my HenryJ and Vega. It covers the area the cars sit on plus about two feet all the way around the outside. It is nice for working on, but I don't always pull them out to work on the truck. There is plenty of room to roll around under the truck with a creeper the HenryJ does have to be up on stands to even think about crawling under it.
With your 33's you should be able to slide under your Crew without any ramps. With my Bone creeper I can just barely slide under my truck with 31's, although it is really close. The Bone creepers are a little weird at first, but they are very smooth with their big wheels and it's nice to not loose pieces of clothing anymore. 
