Wayne,
I have 7 RAD treatments left of my 35. Like Sharon, I really have not found it to be that difficult. The treatments themselves are pretty much a non-event to me as soon as you get used to the feeling of the mask and the bite stick. I have actually fallen asleep several times on the table, so it really hasn't been hard for me.
The side effects of RAD differ for everyone. I have really thick saliva and a sore throat that can be managed with 600mg of Motrin. I do not have any other sores in my mouth and my neck is in great shape. Truthfully, I think chemo is 500 times worse than the RAD. It is not a fun time, but you will get through this!
Good luck!