We took our Trip Clip clipboards on a camping trip and the kids used them to play Battleship together while we were hanging out at the campsite after breakfast. It works on paper just as well as the boardgame but without all the tiny pieces.
There are lots of printable travel activities at The Trip Clip® that you can bring on your trips this summer: https://thetripclip.com/tc/Main/entertain.php
The Trip Clip Blog 