Keep in mind the Sammi, tracker, etc spin the front driveshaft even with the transfer case in neutral and the front hubs unlocked. That, of course, turns the front axle! That's why you can't tow the auto-locking hub versions.
Removing the rear driveshaft and unlocking the front hubs is best. You can take the four bolts out of the transfercase end of the rear drive shaft and tie it up. That's always worried me 'cause dropping the driveshaft would dig into the pavement. Better would be to take out the four bolts on the axle end and tie the driveshaft up. then dropping the driveshaft would just pull the shaft apart and drag the spines down the road. Unpleasant but not a disaster.
I just take the driveshaft out completely and put it in the back seat with baggies around the u-joints. This winter I took it out in -10 degree weather. NBD
I gain a couple MPG towing it with the rear driveshaft out - no kidding! Towing it with my Traverse not the Mountain Aire
Nothing adds a couple MPG to THAT!