Yep! Our little hybrid made 4 trips to the Fort with the pups - each for 2-3 weeks. We did crate the dogs when we weren't there. I know of more than a few cases of dogs escaping from tent ends - either in popups or hybrids. Our unit had A/C and we were there in Nov/Dec so temperature wasn't an issue.
Our hybrid had queen beds on both ends. In our case it's just DH and I so the dog got one end (we easily fit 3 crates across) and we got the other. This was last year in the 300 loop.
The first 3 trips were with 2 dogs. Last year we added Li'l Lyn to our family and that kind of maxed us out for space in a 21' hybrid without a slide. We still managed 3 weeks at WDW pretty nicely, but space plus us getting old and lazy pushed us to go for the hard side TT.
We shopped for the new unit for quite a while, with a floorplan that could accommodate 3 crates being a priority. We finally settled on an Open Range Roamer. They had one floorplan with a side slideout bunk that just happens to comfortably fit 3 24x36 crates (yes, we shopped with a tape measure).
We got it home, ripped out the extra couch and bunk and installed the "doggie dorm". Then DH fulfilled his lifelong dream of building a bar over it.
The raised area in the back of the bar lifts up so that we can put fans in for the dogs when we don't need the a/c or just need a little extra white noise.
The pups will still stay in the crates while we're gone. Otherwise they'll be bouncing all over the place with their heads in the windows barking at everything that passes.
Oh! And because this area was originally intended as bunks, there's a hookup right there for the small bedroom TV that came with it, so during the day they can watch the Disney channel.
But they're loose in the camper at night and when we're inside the TT (although Lyn still prefers sleeping in an open crate). We bring x-pens with us to setup outside when we're hanging out at the site. 2 x-pens joined together fit perfectly on our 9x12 camping mat and provide enough room for a little play time at the site. The 2 pens fold and fit perfectly in the storage compartment.
Yup, go ahead... you can say it.... we're those crazy people who bought an RV and then tricked it out for our dogs.