EXCIN
There is a way to tanker fuel without the wing problem. Put it in the center tank and don't burn it. Yes I know that isn't the standard way to do it, but it can be done. It becomes part of the aircraft's zero fuel weight at that point, so consider it like extra pax. You can't get quite as much that way (because of wing bending moments and whatnot, but it can be done.
Its called ballast fuel then, and will stay quite warm in the center tanks. Then you open the fuel transfer valve on the ground and pump it around if you round tripped your fuel, for the fueler will simply add his fuel to the wings and center as applicable.
Just requires a little thought on your load planning/operating the aircraft to make sure you don't excede wing bending and then don't forget and burn it anyway... Also you could let down a few min early at high speed. A nice high TAT will warm the wings quick.
CHeers
Wino