Here is some (abbreviated) info on the runs from the: Guide to Southern California Backroads & 4-Wheel Drive Trails.
Coyote Canyon - Moderate: About 9.5 miles one way to campground. Allow 3-4 hrs. for round trip plus additional time to explore other legal roads. It may take us longer to do this run with multiple vehicles.
Calcite Mine Road - Difficult: an hour to reach the mine. Only 1.9 miles. Side canyons to explore in Palm Wash. I believe it took us less than an hour to get up there in Dec.
Truckhaven - Difficult: 11.8 miles. I (the author) drove this in about three hours with help from an expert guide. Plan to spend the day in the area. IIRC, this is the loop the TDS group does. This route is not the only one out there, but the only one outlined in the book.
More notes on Truckhaven: The area is a maze of deeply cut trenches and sharp ridges. Extremely narrow with tight turns, near vertical climbs and cliff like descents. Articulation is severely tested for the average hardcore vehicle. Lockers are necessary, preferably front and rear. Vehicle damage is possible. This loop may not be the best for this trip. If we go to Truckhaven, I believe we should just plan on exploring the area; driving up washes and such. You really can't get lost out there.
For reference, it took us a day (I believe we started around 10-10:30am) to run West on Palm Wash, playing around a bit and doing some light hiking. Then up Calcite Mine Rd and back to S22. Finished up the day by doing Rockhouse Canyon and getting back to S22 just after nightfall. Rockhouse Canyon is long and slow the last half of the trail. It probably took us at least 2.5 hours for that run.
Hope this helps.
Reid