Larky, you can haul a Cirrus no problem on your truck. They don't look like the lightest, but they're sure lighter than the big pig AF, Host, Lance options.
I think they're also the best looking campers out there, inside and out.
The radiant heat is a big deal for cold camping. I'm sure it doesn't use more propane than a forced air heater. How does it do if your running dry (extreme cold, no water on board) I wonder?
I wouldn't let the truck stop you from getting a bigger Cirrus. Couple upgrades to the truck and she'll haul it great.