I'm thinking you are close there, Roy.  I know that they have a show in Louisville that is strictly for dealers.  At those shows, the manufacturers show their new lines and try to promote for new dealerships.  For some reason, I'm thinking that their show is late in the year, such as November/December and that the new models release in the Spring/Summer time frame.

However, with all that said, some manufacturers tend to install new systems prior to that.  For example, DRV Suites came out with the options of the Mor/Ryde suspension systems for their model some time ago, but they didn't wait for the "new model year."  They sometimes make the decision to add an option and then just start doing so.  As a FYI, I received a text message from Alicia at Rolling Retreats (DRV Suites dealer in Elk City, Oklahoma) that DRV will be coming out with a floor plan with a bath and a half.

Terry

When we ordered our new Montana 3610RL the dealer called us later the following week and told us that since it was going to hit the production line after April 1 it will be a 2015. Many manufacturers also introduce mid year models with changes made from feedback they get from the earlier shows during the year.