Explore the below site. It's the only one I could find with direct from/to Ekkamai.
https://12go.asia/en/travel/bangkok/hua ... or_id=3107
Minivans Hua Hin to Ekkamai
Re: Minivans Hua Hin to Ekkamai
Governments are instituted among Men, deriving their just powers from the consent of the governed. Source
Re: Minivans Hua Hin to Ekkamai
Possibly the van station in Soi 51?