Aquiana
Absolutely he should go by himself, or if he calls the AA number in the book, someone from AA will go with him if he wants. Going alone, means he can feel free to share whatever he wants, and he can focus on hearing the message from others. At some time later, it might be nice if he wanted to take you to an "open" meeting, where you could just listen and learn and meet some of the people in his fellowship. But remember that it is his recovery, and we usually try to keep our hands off it.
Hugs
Ann