Hi Marty,
My husband is 2 year's post treatment and still has trouble sleeping. What does seem to help is keeping his head propped up more with pillows. He can't lie flat, he says it feels like he's being choked. My husband sleeps with his mouth open so when he wakes up his throat is even drier. Because he has to drink so much water, he has to go to the bathroom more often and that wakes him up a lot too. For us, it seems like this sleep pattern for him is our new normal. I don't know if this helped, just know you are not alone.
All the best,
Shelley