Update:
I have the heat up, the humidity up, and moist substrate with lots of hides along the way from the cool to the hot side and a large water bowl.

I gave him a nice long soak in warm water before. He appeared to be drinking (and I got the stuck shed off ). He has perked up a bit now and is acting more like a snake than a slug. The tongue is now working and he is moving about more.

I am going to leave him alone tonight and tomorrow and check on him tomorrow night again. He is in a very low traffic area. Only myself goes down there and that is only because he is in QT there now.

I think it is a combination of being young, the stress of shipping, and getting chilled and possibly a bit dehydrated.

He seems right now to be doing much better than a few hours ago. He actually moves now.