1) Any bike equipped with an XtraCycle "FreeRadical" frame lengthener becomes a "bike cargo truck" that can carry an amazing amount of bulky stuff on the sides of the bike behind the rider -- no trailer needed, and it's very stable to ride even when loaded.  You'd probably carry your table in its case vertically using the optional shelf that attaches to the bottom of the FreeRadical frame.   http://www.XtraCycle.com .  Several bike makers now integrate the FreeRadical-type rear end elements into purpose-built bikes; two examples are XtraCycle's "Radish" http://xtracycle.com/radish/ and Surly's "Big Dummy" http://surlybikes.com/bikes/big_dummy_complete/  Warm Planet Bicycles, the bike shop next to the downtown SF Caltrain station (Townsend St. at 4th) carries the Surly rig.
 
2) http://www.BikesAtWork.com makes wide stable space-frame trailers in several lengths.  They come with a special hitch adapter that attaches to your bike's left side rear triangle.  You'd want to attach a platform to the top of the space frame so the space frame crossbars don't indent your table when you hit bumps on the road.  I used an 8-foot-long BikesAtWork trailer when I managed Stanford's bicycle program in the mid-1990s.
 
John Ciccarelli
http://www.BicycleSolutions.com
(currently a McKinnon student)