Travelling from Nevada to Alaska in the Middle of Winter

You could make a platform of wood to place the bottle jack up to the frame. You will need to lift the frame much more and if all is not square could be a safety issue. Nothing will bend if you jack on the u-bolt and you just need to raise the tire one Inch. Practice at home and see what works for you while you are servicing the bearings. Your jack in the tow vehicle might even work fine.