Bon Bon to Hansa is about 3 hours to 3,5 hours. The problem is the ferry. If you just missed it, it takes longer of course.
About Bakken/Tivoli, I suggest you first go to Bakken and in the evening go to Tivoli (15 min drive. I also did both parks on the same day. 11:00-17:00 Bakken, 17.30-00:00 Tivoli. Worked out well). If Tivoli is opened till midnight, stay as long as possible! Tivoli is really, really, really great at night! It's my number two park. I really love it.
I maybe coming to Walibi, depending on if I have to work at Toverland.
If you're leaving Farup (We where bored after 5 hours, so it doesn't take much time), you can also go to Tivoliland in Aalborg. It's a 20/25 minute drive from Farup. They have a weird Pinfari Big Apple with spinning station, the best boomerang ever and an Indiana Jones lay-out Pinfari (That ride is very funny!).
If you're coming to Toverland, let me know about what time you'll be there. I'll be in the office so I can't see you entering the park. In Moviepark, first go to Ice Age, that's the most popular ride. But at the opening of the park, it's only a 10 minute wait usually. I got 4 coupons which for 50% of the entrance price. I can sent them to you or give them to you in Walibi World.