CAMDEN, Maine ― Voters here soon could decide the fate of a 3-acre property along the Megunticook River that’s been ripe for development for nearly two decades. Camden has received four proposals to transform the former Apollo Tannery site, which the town acquired in 2003 after the business closed and property owners failed to pay taxes. From giving the land away in exchange for job creation to considering proposals for a movie studio and an ambulance center, the town has tried to develop the site for years.