Not really a question but more of a heads up, book in advance for Belgium sites! In both Bruges and Ghent so far we have had issues getting into all the sites due to holiday travelers. We had to wait 4 hours to see Castle of the Counts and the Ghent alter piece in St. Bavo! In Bruges, popular museums and experiences sell out day of (or maybe even before) so book maybe a week or so in advance for Beer Museum, Brewery Tour, etc. It’s also just more crowded in general because of the Christmas markets and holiday travelers. Dinner (and even lunch) reservations are necessary!
TLDR: Book your day trips/meals in advance - train tickets and sites you want to see as the guidebook doesn’t advise this. We had issues with train tickets selling out as well!