The city and Save Libertyland prepare for the historic roller coaster to move to Green Bay...by Natalie Mayo...Memphians will soon be able to get a free ride on the Zippin Pippin. The only catch is: They'll have to go to Green Bay, Wisconsin, to do so. The city of Green Bay became interested in buying the former Libertyland ride, the country's second-oldest wooden roller coaster and Elvis' favorite, in January. And like the Zippin Pippin itself in its prime, things are moving quickly. The purchase proposal will go before the Green Bay City Council March 2nd. "We…