There is no easy way to find all of them. Just stay plugged onto the local boards and you will hear about a lot of them. At Town Center Park we have the big Christmas in the Park event coming on Saturday December 6. Also we have just started a Thursday Vendor Market in the Park every Thursday afternoon from 2pm to 6pm alongside the Farmers Market. email firstname.lastname@example.org for more info.
There is one this Saturday in Atascocita in the parking lot in front of the "Just 99 cent store". I saw it on one of the signs this week. Advertised for Saturday and Sunday. 10 a.m. to 5 p.m. call 281 451 7728 for info. I am looking for a crafting partner to sell at Houston area sales and to share expenses, possibly working together. If interested lmk.