Dont waste your money
We have taken trolley tours in several other cities and have found them to be a great way to see the city and learn about it. We took the trolley in Salem and were dissapointed. Sadly, I have many complaints about this.
-We received very little information about the city. The guide often had periods of dead time when he was quiet.
-The route itself is a a little depressing. You get taken past power plants and turn around in a marina and campground. (As a camper too, this campground looked horrible, and there is no way I would stay there).
-The company seemed disorganized. When we first went to the trolley stop by the visitors center, we were directed towards a trolley, we got on it and were told that it was their taxi service. We had to go back to the visitors center and wait for another trolley.
-They need to coordinate their timing with the major attractions on the route. We took a tour of the House of The Seven Gables, (which was excellent), it ended at 4:25, however the last trolley stoped there at 4:15. We wound up walking back to the visitors center.
Salem is a very walkable city and my recommendation would be to save your money and put it towards a guidebook, or research the city online. One you have done that, walk around the city.The major sites in Salem are connected via a red stripe that is painted on the sidewalk, so its easy to navigate. You will get more out of a tour that way then taking this trolley.