They can contact the Northwest Adventure Center and they can help them out with Ft. Lewis access...they are the ones that control the hunting on the Ft. and if for some reason the area he want's to go to is under Range Control, they can at least let him know that and how to obtain a Range Control Pass...which is different than the hunting pass...sometimes both are required depending on where he wants to go and what is open...NWAC controls the hunting education side, and Range Control handles the access to certain parts of the base (like near the Nisqually River).
Here is Northwest Adventure Center's phone number...just keep in mind it's a government operation and the person answering the phone might not have a clue about hunting in January...as they mostly deal with the pheasant release stuff...
253-967-6263
G-C-R