We need to take a train from Amsterdam Schiphol to Burgge BE after arriving at 8:00 on overnight flight from US. Is it best to wait and buy the ticket after we arrive so we know for sure what train we can make - based on whether or not our fight is on time and how long it takes to get through customs? If we go ahead and buy a ticket - say for 10:30 - can we use it on a latter train, if necessary? Are tickets bought at the last minute significantly higher than those bought in advance? Also, how easy is it to get to the train station inside the airport from where you exit customs? We will have carry-on luggage only. Thanks!