i lost half of my saliva glands,radiation effects are manageable. i would encourage you to go through it. my dry mouth has become manageable, with a cooler of water in my truck at all times. dry mouth is worse in hot weather when doing physical activities, but as you progress in recovery you can do more. i had dry mouth "attacks" and found staying hydrated before you feel thirst is a big help

after 3 sarcma flr mouth,fially removed, reconstruct from thigh muscle. 1/2 saliva glands removed, plus more glands than i can remember