We will be in Copenhagen Sept 5-8th next week. (Baltics Cruise leaves on the 8th 2 weeks). Red Badge Guides are only Friday and Saturday at this time of year. You can hire them as a private guide (fixed price all Qualified Danish Tourist Guides) for 1825 DKK (E245) cash only, 2 1/2- 3hours. They will meet at our hotel in city center. Richard Karpen (H C Andersen character) does regularly scheduled group walking tours at 9:30 am 90 minutes for US $20. Huge price differential. Any advice from those who have been?
I don't have comments about either of those guide services, but will suggest a Bike Mike tour. It was a fun way to see the city like a local and Mike is quite entertaining. There are tours available on some of your dates: https://bikecopenhagenwithmike.dk/