I own a 2011 Skylark and we love it. We have the front kitchen version. My wife really likes the convection oven microwave. We have towed ours from Pennsylvania to Idaho and back with our 2012 Honda Pilot among other places with only a Reese sway bar. Trucks passing by can really push the front of the trailer around. Our Pilot gets between 10 to 14 mpg depending upon terrain and speed. We find it most comfortable to tow the trailer at 55-60 mph.
With regard to no roof mounted A/C, your heat pump should work just as well to keep you cool.
I have made several modifications to ours that you can read about
here
I would advise you to check the tires before you travel as we had a tire fail after just 3 years and not a lot of mileage.