The January 2012 issue of Motorhome magazine on page 16 has "RV Shows". The first one in the list is the Ohio RV Supershow in Cleveland on Jan. 4-8. There's also one in Chicago on Jan. 12-16, Cincinnati Jan. 13-16 & 20-22, Pittsburgh Jan. 14-22, 2012 Mid-America RV Show in Kansas City Jan. 26-29, and Sandusky OH on Jan. 27-29. You didn't mention the type of RV, but Motorhome magazine's companion Trailer Life probably has a similar list. Every issue of Family Motor Coaching lists the FMCA rallies and shows. This is the time of year for RV shows, so you ought to be able to find a few.
By the way, RV owners are in a perpetual state of "looking" so don't be misled by the seeming lack of information. Just Google RV shows 2012 and you'll find lots of them. Many of our threads have to do with specific RVs or comparisons which may be why you didn't find much. We also have in the library checklists for purchasing and delivery.