Andy750: You've got a good set of hand guards on there. I've done similar 1000+ mile adventures in cooooold temps! True ADV spirit, eh?
Got to disagree though. (this is going to turn into a 'ford vs. chevy' thing...) My hands chill easy, yet with a set of curved guards and good gauntlet gloves, I've had zero trouble riding all day in the 26-30deg temps. Do have a small removable windshield, but it covers headlight area only. No hand protection. Thus the use of hand guards and top quality gloves. Ridden with my ski mittens as well. No issues operating controls, and stayed very warm!
Go back to thinking about snowmobile guys. They are out in sub zero temps. Guards and good gloves suffice for the majority. I've used heated grips, and have concluded they cause overheating, and sweating. Which when its cold out...moisture is the last thing you need you on your hands.
Although everyones cold tolerance is diff.... And there's an even smaller percentage of riders who ride in those type of temps, anyways.