My first stop for checking out RV parks and camping in unknown (and known) locations is rvparkreviews.com. It is an extremely well-designed website, easily navigated by state-by city without instruction, and full of useful information in a consistent format (including links to the park websites). The “reviews” and ratings are user- generated, and there’s no real common denominator. Some people rate every location a 9 or 10, while others are more objective. I find it is helpful to look at user’s ratings of parks that I’ve frequented so that I can somewhat calibrate their individual rating scale. The site covers both commercial RV parks, and local/county/state/national parks if users have generated reviews. If I need additional information, I prefer Trailer Life to Woodalls, and I sometimes look at AAA if I have further questions since they often provide information relative to the number of sites/acre so that I can get a sense of how jammed things really are. I also pay special attention to nearby state and county parks, and visit their websites in advance or while on the road. All in all, there’s more art than science to the process because the beauty of the surrounding area often colors opinions of the campground per se; consequently, no matter which approach one uses, a parking lot in Yosemite tends to score higher than a “resort” in the middle of nowhere. I too like MS Streets & Trips for planning my routes and measuring distances.