I'd go with the 2-bedroom. You'll all have much more privacy, a full kitchen, and the washer and dryer. The washer and dryer alone, I should think, will be worth their weight in gold!
As far as location, we've stayed at OKW, and our home is VWL. In both places, transportation was never an issue. From VWL, you can take the ferry to MK, which is very nice, but I wouldn't use that as a priority in choosing where to stay. If you've only got enough points for a 2br at OKW, you'll be fine.