I f you’re feeling adventurous, you could travel to one (or all) of the Dyrt’s Top Camprogrunds for pets! Here’s this years winners: https://camperfaqs.com/community/topic/top-9-dog-friendly-campgrounds-for-2024.
Also, no matter what campground directory you use, I’d suggest calling them ahead of time to make sure they are pet-friendly. The filters on those directories are not always accurate.