Holiday World RV Supercenters in Katy, TX. Specializing in Keystone Fifth Wheels and Travel Trailers. Also, We have Fleetwood, Newmar, and Winnebago Class A Diesel Pushers, Class A Gas motorhomes, Class C Motorhomes and Class B Motorhomes. We also have Jayco Class C motorhomes as well. Holiday World also has a wide selection of used motorhomes, fifth wheels and travel trailers to choose from.