Buster,
I also did pretty well.
The first month of RT wasn't bad and they had me fatten up a bit.

The second month I gradually went downhill and relied on my PEG (mouth & throat sores, mucous, awful taste, loss of appetite, mild rad burn).

The last week I got sick - nausea, vomiting, dehydration, and bad rad burn.

My recovery was the reverse, each week was a bit better and within six weeks I was fine and got my PEG removed.

Food still tasted bad or tasteless for several months and my appetite was poor. Without the PEG I "easily" lost a bit too much weight.

There were only a couple days the last week of RT that I needed help. Otherwise I drove and took care of myself, but, just in case, be sure you have a support network.

Once you switch to PEG feeding, it is a good idea to set out your daily ration of cans. Otherwise, I would tend to skip feedings and hydration.