Whether or not you can bring your pets with you in the RV is up to each individual RV owner. Unfortunately, filtering for pet-friendly RVs is not currently an option, so you will need to check each listing or reach out to the owners to find out their specific policies regarding pets.
Each listing will already note whether or not the RV is pet-friendly. You can find this under the Suitability section of the listing, which is located just below the Photos and Description of the RV. When you find a pet-friendly listing that you are interested in, you will want to message the owner by clicking on “Contact Owner” so you can discuss the details of your trip and your plans to bring a pet.
Most owners will want to charge you a fee or extra deposit if you are going to be bringing a pet, so make sure to let them know before you book. If you bring a pet without the owner’s authorization, they will likely charge you a much larger fee against your security deposit, so it is in your best interest to disclose all of this information up front.