I will do this trip every spring. Keukenhof is only open the last week of March through the third week of May every year. If you want to come to the Bollenstreek (bulb region) with me next year, we can start planning now. Next spring I plan to spend at least 4 days in mid-to-late April, biking, exploring, beachcombing, and flying kites.
The Flying Pig Beach Hostel in Noordwijk is a classic beach shack right next to the shoreline, shopping, bus stop, and four ice cream stands. If you like colorful flowers, stroop waffles, sandy shores with seashells, and beach bumming with the locals, then mark Noordwijk down as your next spring break.
The video highlights are on my YouTube: Escape to the North Sea.