DD (age 7) and I just did the 'Family Magic Tour' this past December. Yes, this is set up like a 'scavenger hunt'. We had a GREAT time! I think whether or not you like it depends upon the age of the kids and if as adults, you mind being a little silly.
The tour lasts just 2 hours so it was perfect for my 7 year old and the younger 4 year old that was on the tour with us. We lucked out as we were only one of two families on the tour (Monday in mid-December). I have heard that capacity for the tour might be 25 people.
You are met by a CM who immediately involves the kids on a 'quest' to find Captain Hook's hook that has been stolen. We followed clues all through the MK and ended up with a 'surprise' at the end.
Again, if you don't mind being a little silly, and you have elementary school or slightly younger age kids- it is a good time.
Happy Planning!!