I've learned that the 2 hour drive is easy, and that's about max these days, but I take a nap before I tackle it. The dog, of course, would prefer to go hunt in the woods, but she knows not to lick me in the face so that when I wake up rested and rare'n to go (abiet with quads and other soft body parts burning and sore): she and I can go do some exploring before the 2 hour drive home. Whereupon once we get back to the car she sleeps all the way home and I drive.
I'm learning to love the naps (pulled off the road onto another road and breathing fresh air) as much as I love the skiing. I've been a long time climber, and saw too many folks die in traffic accidents while trying to fight off the sleep on the way home from climbing to not slow down and examine that statistic. It can be easily mitigated with a short nap. When I was 20 years old, we often did 20 hour road trips to go climb. I never had an issue staying awake: ever. In fact, I have done multiple 3 days straight and awake for all of it day and night day and night day and night while in the military. But those days are long in the rear view mirror. Why push it? If I get tired, I pull over and sleep.