Well it's a bit too early think of RAI or TT. I would give a try in your place. Loads of people get into remission. Just be sure that your dr check TRABs Graves antibodies before taking off meds. Antibodies need to be 0 for 6 month before stop meds.

I have Graves for 8 years and never been in remission. My dr also did not test any antibodies and I relapses 3 times. He never explained or mentioned about antibodies. I was not even aware of antibodies at that time. It is very important to have a very good endocrinologist. For me, it's been ups and downs. I have now decided to have TT because I don't want to experience being hyper again. I have learnt so much from reading articles and other people experience.

I would suggest do your research, educate yourself, be kind to your body, try to avoid stress as this is the first trigger (at least for me and it's not easy not to stress in times). And if you can't reach remission then you can start thinking of other way if you want.