That's great news. Have fun on your trip!
If you have a need next time, you should be able to drop the tcase cross member and support with a floor jack enough to get access to the actuator.
You need to properly time the CDL and gear on top of the transfer case. Take the CDL actuator off, leave it plugged in and unlock it. On the inside where the gear sits, you'll be able to spin it so it will be in the unlocked position.