Welcome Craig
My hubby also had a stage IV ( base of tongue).
Sure the treatment is rough, in fact its a nightmare but, boy the results are worth it!
We are 3 years out... he is going full steam ahead.... and life is great again.
By the way, do you have a PEG? We considered it a lifesaver when swallowing was an issue.
Nice to meet you , let us know if we can be of any help to you or your wife.

Marica