Listings in Good Sam campground guide

I find Trailer Life, the GoodSam directory, to be an excellent first source when traveling. It may not list EVERY RV park, but those not listed may have a reason for not listing, such as not being public. Once I have a few parks in mind I check RVParkreviews.com for peer to peer comments. I also check the campgrounds website for location, direction, and photos. The entire process only takes a few minutes. Finally a phone call to the park verifies that they have available a site that fits my need. I'm not afraid to ask: "Is the pool heated? Are the pull throughs level? Do you get cell phone signal? Park WiFi is always nice, if it works, if the park is not full crowding the bandwith. But we travel with a hot-spot.
Many RV parks are expensive, but give me a super clean park, with a well planned comfortable pad, and I'll pay the rate.
JMHO