I feel for you, I really do, you are in a tough situation. I found out the "truth about the truth" way before my husband. When I stopped attending meetings, he stopped as well because he didn't want to go alone. I tried and tried until I was blue in the face to tell him things, and he'd always tune me out (story of our marriage really). I knew the guilt of not going was eating away at him, and talked to him about it once and said I'd attend some meetings with him (the talk on Sunday, maybe the bookstudy), but also pointed out that he is an adult, he knew when and where the meetings were, that I in no way ever prevented him from going. That was the last time it was brought up, he never asked me to go and he never attended either.
The guilt still tore him up though, until I finally took drastic measures and introduced him to a fellow JWD'er to get him to think, because he wasn't listening to me. He's now out, but has other issues he's dealing with because of his time in the cult.
You have to tread carefully for your wifes mental health, but you also have to take care of YOU and your needs. Since you've moved, you need to make some new friends in the area anyways, try and make some new friends in the area BEFORE she starts attending the new hall, if at all possible. Take things slow, keep the lines of communication open, that is a MUST, make sure she knows your feelings and position.
Ultimately, the decision to go by herself is up to your wife. If she really, in her heart, thought this was the "truth", going without you wouldn't be a concern, IMO.