Is This Enough Truck for 5th Wheel??

I have 4wd and live in SoCal - so it doesn't get much use. But I find it especially useful when maneuvering my trailer into its storage space alongside my house. I have to crawl up a curb across a loose dirt horse trail and then up a small slope to my driveway to get the right angle of attack. I drop into 4LO and I can slowly creep up and over the curb and up to my driveway without hesitation. When attempting this in 2wd, trying to get up the curb was not fun (and probably not good for the trans) - high revving to overcome the torque converter stall.