We did the Ghostly Night Tour, 2 adults and 3 teenagers in our party, and we all enjoyed it. The unfortunate part was that it was 45 degrees and pouring down rain. Our guide provided umbrellas and ponchos for those who needed them and we made the best of it.
We saw 8-10 spots around the main part of town and heard some really great ghost stories, including some history of Salem.
The walking isn’t too bad at all, no real hills or bad terrain, but use caution as the cobblestone and bricks are often uneven.
Highly recommend this tour company. Our guide was named David or Daniel, can’t recall, but he was very good too!