Thank you for rescuing a shelter pet!
Emily Dickenson when she was a kitten:
Thor a week or so ago:
Hmm...do we have a show your pet thread?
This may be a bit cheesy for you, but if it were me- I would take a bike rack ($60 at Walmart, $25 on craigslist) and secure the bags to it. If I wanted something more aerodynamic and aesthetic, I would turn it into a boat tail like on my Insight. As long as the top can open the baggage can go in and out, and when it's empty the hatch can be opened no problem.