January is probably the busiest month, but I would think with a truck camper you would have more opportunities than most for a good site. Then again I’ve seen a lot more campers out this year than most because of covid
AZ5' Little Guy Silver Shadow - Rough RiderFord Explorer Sport
Answered on 11/20/2020:
I’ve never had a problem finding a spot, nor is it ever busy. You won’t have a problem finding a spot. There are many pull outs, but the further you go toward the mountain there are many boondocking opportunities.
Saddle Mountain is busier now than it was several years ago when I first discovered it - and January is certainly "peak" time there. Still, it is a fairly large area and the number of campers seems to flux so some days/weeks are busier than others. I would think with a truck camper in particular that you would have no problem finding a good spot.