qmsdc15..... it seems that like you haul a ton of different things. The chocolate thing is the only "issue" with bike trailer delivery that seems to have come up in this thread.
One idea that i had, was that one of those huge marine coolers
http://www.coleman.com/coleman/colem...id=8550&brand= might make a good general carrier..... a little ice in summer and bottle of hot water in winter and you have climate controlled delivery..... the chocolate thing could be such a corner case that it doesnt matter.
The other thing that struck me, is that you should have a sign on your rig to advertise your service.
ps: how is the cat doing