We've been using this for over a year. There is an trip preferences page you can enter the height of your rv and the planner will give you low clearance warnings on your route. It will not warn for propane restrictions, steep grades or curves. You can also input your fuel mpg, anticipated fuel cost per gallon, various other expenses, and routing preferences (road types). One nice feature is you have three inputs for the miles you like to drive, for example 200, 150, 100 miles the map will have three rings around your starting point at those intervals and show all campgrounds within those rings. You also get to pick what type of campgrounds you want to show up. There's other features like fuel locations and fuel prices and a very good selection of points of interest you can turn or off. I've found it to be my favorite planner to use and I've used them all, it doesn't do everything but it comes closer than the rest of them. There has been no advertising or campgrounds feeding us information and they do not charge the campgrounds, I've found campgrounds that were not listed and emailed them about them, they put them into the database very quickly. There is a full list of every type of campground you can imagine in the preferences pages. Including state and national parks. They have been steadily improving and updating the program also.