I have both S&T and Trailer Life. I like S&T best because I can import POI Files(Points of Interest) and each one can have a different indicator on my map. For example, one indicator would be Good Sam's CG's, another would be PassPortAmerica CG's, still another would be Wal-marts, and then one that shows all RV parks for a state, and one that shows Low Underpass Clearances. I can plot out my route for the day or multiple days and see what CG's, Wal-marts or any other place that I am interested in are near my route. If you are only interested in CG's that are in Trailer Life, then it is okay. I like to use PassPortAmerica when possible and S&T makes it very easy to see where they are on my route.
Point of Interest Files that I have loaded into S&T:
All RV parks for states I am traveling through in near future.
Pass Port America
Good Sam's
Wal-mart & Sam's
Camping World
Places to visit (Has some really cool places to visit that you may not know about)
The Best things I have ever Ate (We have really found some great food with this one)
Low Underpass Clearances
National Parks with RV parks
Half-price Book Stores
Escapee 50% Parks
Casino's in USA
Macaroni Grill
I download my POI Files from
http://www.poi-factory.com/