We made it! By the time I got to Maine, dad and daughter were smiling - don't know what was talked about or said - didn't ask. I immediately cracked out the appetizers on the picnic table and we all talked and watched the rest of our family arrive at the campground.
Not one mention of any of the affair, not one argument or fight. We got home yesterday, and made it through the night alone in the house with no distractions, no tension (OK, very little) and no arguing.
I know it's only a small amount of time, but we've not had a single day that didn't end in arguing since May 21st - so it's a big hurdle for me (us).