Can anyone recommend a private guide you have used to tour the tulip gardens? How much time would be good to plan and what other experiences might go with the private tour of the tulip gardens?
A tour guide is unecessary for the gardens. Just use the map supplied as you enter, or use the online map if you prefer. 3-4 hours is the average time spent. YMMV. We were there for around 6 hours. The official website is full of good info: https://keukenhof.nl/en/frequently-asked-questions/
If you want to combine the Keukenhof with other tourist sites, you can check Viator or TripAdvisor for combo tours.
I ran across a blog by someone who visited last spring. It's full of details of the garden visit, as well as mentions of other nearby activities like biking or driving around the tulip fields of Lisse: https://thrillingtravel.in/tips-for-visiting-keukenhof-gardens.html
Agree. You don’t need a private tour guide. Just research how to get there and back, either on public transportation or a third party carrier. The Keukenhof website has good information. We spent 5 hours there. So for us, it was an all day outing. The only experience on that same day was dinner back in Amsterdam.. but you might consider an evening canal tour.