You act like its the end of the line for those hostas, I'll admit I don't have that one, but I've never met a hosta that I could kill!
Just take a spade and pop them out, the gas company will tell you that the gas line is atleast 18" deep, I've never seen a hosta get close to that depth!
As long as you leave the backhoe in the garage, you won't hurt that line, that's why they use steel pipe!
Just to prove a point, I dug a few hosta last October, knocked the soil off, and tossed them out into the field... Done landed upside down, and every which way, I never moved them after that, they set their feet and haven't slowed down...
Mind you this was a record breaking winter here...
They are much tougher than most people give them credit for