On a weekend, you can choose Saturday or Sunday for a more convenient travel., I can personally guide you to go to the top place of Hipster zone. Train Night Market at Srinakarin road in Bangkok it is within the 4 hours service. The fee indicated is only the tourist guide fee and does not include the entrance fees, transportation cost and food. Expenses(tourist + guide)during the tour shall be the responsibility of the tourist.
There are some permanent antique shops and pet shops / dog spa's, the flea market area is about 150 meters inside, behind the food and cloth area that is separated.location with some more modern facilities, so it should be at least as good as the old one.