We were on this cruise a couple of years ago. Copenhagen is lovely. Here are couple of ideas. Don't bother with the shore excursion to Tivoli. Way too expensive. Take the Hop On Hop Off bus which you can get close to pier. Ride it around to see all the sites. Jump off second time around at tivoli. Buy your own ticket. You can get one with rides or without rides. Or just some rides. Walk around maybe have lunch. It's beautiful. Also be sure to go to port and walk around. So pretty.
Thanks! This makes total sense! So, how long is the trip around on the HoHo bus?