Originally Posted by Winfried

The problem with seatpost-connected trailers, is that at this point, none are quick-release, since folding bikes are only a tiny portion of the market. The Burley Travoy is no exception, and takes two allen bolts to secure (although a cordless drill does the trick.) I also checked Germany's Andersen, but they don't even have a hitch to hook up their trailer to the seatpost.

Alternatively, you could consider trailers that hook up to the rear wheel instead such as the CarryFreedom or Radical Design.