Soaring costs at the pump have made national headlines over the last few months as gas prices in the U.S. climb to new record highs. American drivers this Memorial Day will be contending with the most expensive holiday weekend at the pump ever recorded. Though more than half of Americans are still determined to get out on the road, high gas prices and inflation have some travelers hesitant to set their plans in stone. The national average could hit $6/gallon by August.