I'm not sure, but I'm almost positive, my Casita has the Dometic Horizon awning. I'm not sure what the differences are between the Catalina and the Horizon; maybe they're no longer using the Horizon, but I haven't heard that from anyone. (Since my Casita's a 1999, your mileage may vary.)
The awning is nice, but we managed without one on our first Casita. Lot's of people use "EZ-up" style shelters, or screen rooms. (I recommend getting the awning - the Horizon works very, very well! But, for the Oregon Gathering, maybe you can make do with your picnic table tarp/shelter/whatever you have. You will, as Donna said, definitely have an opportunity to check out the awnings in use on these small, curved sided trailers.)
Have fun!