Didn't realize initially that this thread was over 3 years old but the topic is still current. After quite a few years without any RV we found that our travels to see our widely dispersed kids was becoming complicated by having to either take or board our dog. Then over a period of a few more years we added two cats. Believe it or not we still wanted to go visit our kids and grandkids but decided that we also had some new kids that needed our attention and love so we bought a motorhome to make sure we could travel comfortably and still be together. Boarding them was never given a thought as the expense and missing them and their daily routines would have been a downer for us. We had previously had truck campers, travel trailers and even a new 1975 Winnebago motorhome so we were not new to the idea of RVing (it was not even called RVing when we started in 1963).
Now we have a new dog and the same two cats and look forward to making a nice trip up north this summer and, because of age and infirmities it will probably be our last trip of any distance.
I forgot to add that two years ago we lost our 17 year old Shih Tzu and, like the OP, said NO MORE. That lasted 4 months and we both yearned for another woofer that we had to let in and out and pick up poop for. Winnie is a carbon copy of Heidi and while she is equally loved we think it was a mistake to buy another dog of the same breed and nearly exact same looks. Winnie frequently gets called by our departed dog's name, Heidi, and that is sort of embarrassing to us but Winnie doesn't seem to notice - she is not too quick to obey commands either unlike her predecessor.......lol
Bill