Turbo leak

Just discovered a leak were the turbo bolts to engine. Peice of gasket missing. I'm blowing black smoke under load and have a loss of power. Also looks like a nut is missing from stud on right side. I have another 3-4 hour last leg of our trip tomorrow.
So opinions on runnng like this for 4 hours. I much rather fix this in my backyard at home and know were to get parts.