Dont over think it.
Roof bars, sorted. Ive had roof bars on for a decade. Same bars on 3rd car. Never leave.
Keeps bikes out the car, means you can fit in a parking space at a food shop etc.
Get thule, the stuff lasts forever.Its worth the slightly more premium over own brand halfords etc. Aero bars not square ones. And you can add a roof box, or ski rack, or kayak holder etc . .its great. Footpacks if you change car although citroen and mazda happen to have the same profile data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
Also wouldn't hesitate 2nd hand thule bars.They dont really degrade so no issues.
Then, get those 4 quid plastic buckets from asda, for laundry, throw dirty kit in it, they are completely waterproof and keep the trail mud inside them.
I think some drilling has to be done for the aero bars on a Mazda data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
Why, footpacks are like lego. clicks onto whatever bars you have. Ive a Mazda 6 estate.
Check here, Thule Roof Racks Guide covering popular car models