IMO, the best straps are....
I have two kayaks and when picking up my friends canoe, for our seniors' paddling days, these straps are awesome. Very fast and secure. They are available in different lengths and colours.
If you could carry your kayaks on your TV, that would be the best way to go. Taking your kayaks off the camper before set up is inconvenient and often you need to drive to the boat launch or out of the campground to the nearest suitable lake/river. When not kayaking on a given day, the kayaks are secured on your TV and when breaking camp, the breakdown is faster.