My wife & I are just getting into (non-sea/ocean) kayaking and biking, and we're thinking about ways to transport our equipment on our car.
My guess is that once a pair of cross-bars are set up on a car roof, it would be possible to use it to handle both 2 bikes and 2 kayaks (although obviously, not at the same time -- either 2 bikes or 2 kayaks at one time). We will be bicycling more often than kayaking, and will be doing this for recreation..., so we're not looking for a serious (expensive or complicated) solution.
Is this accurate? What do I need to take into consideration? How difficult is it to swap out mounting hardware for roof racks? What are better alternatives?