I had actually gone through RAI treatment last year for my thyroid cancer. As you are probably already aware, you have to be in seclusion for 5 days which, I actually looked forward to, to tell you the truth; I'm someone who craves alone time but rarely gets it. Anyway, I had just finished reading the book Eat Pray Love and it inspired me to use this time as my own personal yoga/meditation sanctuary time. Since I couldn't go away anywhere and neither could my husband or children, I basically took over our master bedroom and bath (my husband slept with the kids in their room) and we put a doggy gate up at the master bedroom door so that the kids couldn't just walk in. I stocked piled the bedroom with everything that I need from yoga DVDs, my ipod, art supplies, my guitar (I finally got around to learning how to play it!), books and magazines.
Anyway, the treatment itself was not a problem. The only physical effect that it had on me was that my tastebuds were off for about 3 to 4 weeks. And the low iodine diet before hand, although very hard to get used to, actually made me feel a whole lot better than I had in years. It must have been all of those fresh veggies that I was eating.
Anyway, I'm glad that you are in a gray zone and have a choice on whether you wish to pursue this type of treatment. The only thing that you may want to consider, if you are thinking about going the RAI route, is that you are not supposed to become pregnant for something like 2 to 3 years afterward and the doctor actually makes you sign something stating that fact.
Will be sending a healing prayer your way. Blessings.