There's a guy at my club(Army course Aldershot), Chris Bunnet, who cycles with a large trailer, you could contact him for advice. If you rang the club on 01252337272 they could put you in touch with him.
I suppose it depends on how much you want to transport, ie what size bag, type of trolley, batteries if electric trolley, etc. Personally I've opted for swithcing to a pencil bag only and keeping all my stuff in a locker. But then I had a Robokaddy and full cart bag etc, that would be a heck of a lot of weight to tow on a bike, and a very big trailer!