What to use to find RV sites?

I'm so glad you started this topic, Alexum. We are about to embark on our first trip, also, and I have so many questions! One was about how to find campgrounds. I was supposed to get the Good Sam RV book, 2017, for $6.95 with my membership, but I can't find it anywhere. The online information for our state's parks is incomplete --- doesn't tell whether we can have our dogs, so I have to call each park to find out.

I'll be interested to hear about your travels.
Katie