We had a talk yesterday (about upcoming wedding), so to recap, I want to go with child, she does not want to go, and does not let me to go with child.
At the end I am not going, since I would be going alone.

Am I wrong for letting this one go, and not to get into fight over something that is important to me, but not so important in the grand scheme of things?

Me38,W36,D9
M 10y, R 14y

10/11/2015 wants to leave
25/12/2015 definitely wants to leave, makes plans
Jan 2016 started DBing
Feb 2016 sleeping in separate rooms
Sep 2016 sleeping in same room