I really like the journal idea but both of you need to write one. I forced our kids and myself to write ones when we holidayed/camped and rereading them is wonderful and can be very funny.
Ask her to prepare for the holiday too with ideas to keep you from getting bored. It might be interesting to see what she suggests. You could have a two jars to pick the activities. (one her list and the other yours)
Have fun and enjoy your time together.