Can yall help me decide what to do?

My husband just got his I601a Waiver approved. So now we know the process is going to go much faster from here. Here is the thing. We don't know 100% if I Am going to be required to go to his immigration interview in mexico. If I am not required to go, I am still going to accompany him to mexico so he wont be there alone. Now here is were it gets tricky.

He has not seen his parents and siblings in 7 years. They are in mexico. I have been going to his family for the past 2 years so I'm very close to them by now. I'm trying to decide if I should tell him go see them by himself for he can have a little moment with them, given that they haven't seen each other in a long time or if I should just go with him. He's a very sentimental man when it comes to his family. He loves them with all his heart and he is also very hurt that when he gets there his grandpa is not going to be there since he passed away over 5 years ago. He was like a second dad to him and he has told me he doesn't know how hes going to feel when he gets back home and hes not there. His grandma also has bad alzheimers.

This is going to be a very big day for him. Exciting and Emotional

What should I do Ladies. Should I just tell him to have a couple of days alone with his family or should I just go with him.