Yes,Dino-rama is PART of DinoLand so the Backstory of Dino-rama is PART of the Backstory of DinoLand.Both have really extensive back stories.
Here is a link to the best description available IMHO of the DinoLand Backstory for anyone interested.
http://land.allears.net/blogs/jackspence/2009/08/chester_and_hesters_dinorama.html