Welcome Mark, sorry you have to deal with this. Keep yourself buffed up nutritionally so you can heal and recover quicker. Lots of yogurt, shakes, smoothies. My husband had neck dissection first and then IMRT ,finished in 1/09. Surgery was tough but I think radiation was tougher to endure with more side effects. He had a PEG which psychologically he hated but I think it was instrumental in keeping him in nutritionally good shape. He couldn't tolerate all of the tube feeds and ended up switching over to ensure and my special potpourie of smoothies. still lost 35 lbs. His biggest complaint was all the mucous in his throat and he was constantly spitting it up every hour on the hour.
Good luck in the days ahead, it's not easy but it will get better.
Take all the help you can, rides to RO, food, any offers of help around the house, take it. I'll be thinking of you.