My STBXAH did hat kind of gas lighting all the time. I was not only to blame it because I walked away when I did not want to have ugly confrontations with him but I was disrespecting him and so it was my fault that our marriage was failing.
I think that you are right to ignore his quacking. In my mind, there is virtually no chance that the hotel reservation was for anything like what he said it was for. And, as many people have said above, his past behaviors are plenty of reasons for you to want to move on with your life.
Try to relax and decompress this weekend as much as you can. You have certainly earned it.