Hey Col,
Welcome to myswag, i'm new the site and you'll be amazing at the hospitality your reiceve.
I haven't bought a CT yet, but i'm starting my research and also have two big dogs who will be joining us on our big adventure next year. We are doing 12 months around Australia. I've heard great things about the trackabout and my manager has one who loves it. I'd be keen to hear about your experiences with it and also if you take the dogs with you on your camping trip, how they found it.
I'm still tossing up between a soft floor, hard floor or a 1950's style teardrop (however the dogs are a problem with this option) everyone on this forum is really friendly and open to feedback (they LOVE photos) so be sure to load some photos of your CT.
Good luck mate.