Just took delivery on a new Freedom Hawk Kayak. I can't wait to get to Texas(Dec 1)for three months of fishing. I also want to haul our ocean kayak zest 2. Has anybody ever stacked their yaks and traveled long distances at hwy speeds? I'll be coming from Montana to Port Aransas.How is it done? I have a single yakima rack. Rollers and saddle mounted to the roof rack of a suburban. The OC weighs about 78 lbs and the freedom hawk about 60. Will that be a factor? Any advice is appreciated.