Knowing that we want to be fulltimers(when our house sells), we were determined not to rescue any more dogs, which we love. We often take day trips wherever we park and know that a dog can't be left in the RV all day.
So, when my mother passed away, we were left with her stubborn old cat. She has traveled with us and does fairly well. Still not crazy about litter tracked all over and cat hair everywhere, but she's family now.
We get our doggy fix by petting other camper's pets(with their permission). Plus we can still do all day trips as long as the food and water bowls are filled.