I'd first look under your Hideout. If you can see the holding tanks exposed under the trailer, you do not have any "cold weather camping package". Our 2011 Springdale was "woefully inadequate for freezing temperatures".
I don't believe the 2011 Hideout models had coroplast (corrugated plastic) belly cover. Back then, most entry level Keystone trailers were "minimally built" with 2x2 and 2x3 spruce studding, insulated with small amounts of fiberglass insulation in the walls and floors that was then wrapped in DARCO (plastic reinforced film sheeting). On many of the Hideout and Springdale trailers of that era, the holding tanks were exposed under the trailer, open to the weather. It was, if I remember correctly, around 2015 or 2016 that Keystone started putting coroplast belly covers on those models...
Look at the decals next to the entry door. You may find a "cold weather package decal"... You can download the 2011 Hideout/Hornet brochure here:
https://library.rvusa.com/brochure/2...Brochure_1.pdf
On page 7, you can see the floor and wall construction. It's listed as "Darco wrapped" and the r value for ceiling, walls and floor is R-7. Hideouts from that era were "fair weather, 3 season trailers" not typically designed for freeing weather.