You don’t get more Dutch and more local than bikes and boats! Here at That Dam Guide we don’t have our own boat or bike tours but I (Mark) do recommend the following two companies. They are local and owner operated and have both small group and private tours available.
We Bike Amsterdam
Thijs owns We Bike Amsterdam and we have been recommending each others companies for about a decade now. Thijs has his own shop and bikes and takes care that every step of the tour experience works well. He and his team offer daily city and countryside cycling tours and his groups are smaller than the other companies. There is a maximum of 11 people but there are usually less in the group. Check out his wonderful website here: https://www.webikeamsterdam.com/tours/city-bike-tour/
Amsterdam Boat Adventures
Jamie and Bente own Amsterdam Boat Adventures and they and their team provide 5 daily 90 minute boat tours in boat that seats 12 people. The boat is big enough for eveyone to be comfortably seated but small enough for everyone can hear the skipper. It’s a great combination of relaxing and taking in the sights but also with info from the skipper who guides while steering. Find info about them here: https://www.amsterdamboatadventures.com/