Sounds like a plan. I would only do the trip into town once since you're there such a short time and each r/t will eat up the better part of an hour door to door. Check into your hotel, put on some comfortable shoes, take the train to the city centre and return on one of the last trains back. Keep alert around CS late at night. There are a lot of pan handlers and riff raff lurking about. Be sure to try the beer from the local micro called t'ij (pronounced brewery eye). They have an ostrich as their logo. There is also a great beer store near the southWEST corner of the dam square area called the Bierkoning (beer king). Lot's of beers and glassware and shirts etc. Have a blast!!!!!!!!!!!!!!!!!!!!!!!