It might help if the bags on each side were on seperate fill valves.
But it would also stiffen up the suspension, and everything in the camper would get thrown around that much more. To me, it seems the suspensions are stiff enough already.
The best solution is to have the most streamlined camper available. Our old Cobra was shaped like a bullet, and we never had an issue with crosswinds up to 50 mph. At that speed, the motorhomes are already parked on the side of the road. We just kept cruisin!
But our new Flagstaff isn't nearly so slick, and the winds do toss it around a bit. I don't think there is any perfect solution, and I figure if it gets uncomfortable pulling, I'll just stop and take a break.