Hi JPBrew!
We have a 2007 Subaru Outback 2.5i with a 2,700 lb tow rating. I think it's the same model/year/color as Mr. Edevold's? I know there are other owners out there with newer Outbacks, but here’s our experience so far:
1st point: fuel economy:
Our gas mileage is supposed to be up to 28 mpg on the highway. According to the car’s calculations, I would say that’s actually fairly close. Towing our 550, it's somewhere between 19 - 21 mpg. Now, that's all been within 300 mi of Chicago - some hills but a lot of flatland. We almost never take the interstate and we almost always buy the cheapest grade of gas (but never the E-85).
2nd point: storage capacity:
We used to car camp with the Subaru (with Tim's twin boys) and it was a tight fit! Now, we have plenty of room - on a weekend trip we don't necessarily have to put anything on the back seats. On longer trips, when we would take our kayaks (on the top of the car) and maybe some basic backpacking equipment, we would definitely fill up the back. We don’t put much extra in the cabin - a couple of fender tables and maybe our plastic shoe-boxes.
Note: The newer Outbacks have been seriously re-styled - in my opinion, they look more like a SUV than a station wagon - don’t know if there’s any effect on actual storage capacity.
I've heard, anecdotally, that the 4 cylinder Outback tows better than the 6 cylinder. Again, don’t know if that applies to the new vehicles. Tim says he can sometimes "feel" the camper back there but it's not a bad feeling – just a little extra weight. We have trailer brakes and Tim added a transmission cooler and a K&N air filter.
I’ve also heard that it’s difficult to put a hitch on an Outback - that some places refuse to do it. We went with a local snowplow/trailer hitch company and they didn’t seem to have any problems with the hitch or the electric.
Hope that helps!
p.s. maybe try packing your PT Cruiser with all your car-camping stuff MINUS the stuff you’ll be packing into the teardrop (bedding, cooking utensils, probably most of your food) – you’ll get a better idea of how much space you’re looking at - the Camp Inn has A LOT of storage - and don't forget the front storage compartments - they both (inside & outside) hold a lot of stuff!
Here’s an interesting auto website, not just about Subaru’s :
http://www.cars101.com/subaru_sitemap.html