Foley pilot who crashed his aircraft into an island on Bayou St. John said he had no other choice but to land there when he lost power.   Pilot Don Bonner is sore, banged up and rattled...but grateful to be alive. Bonner’s Cessna 172 aircraft experienced loss of power and then complete engine failure while pulling an advertisement banner along the beach on the Fourth of July. Beaches and area roads were packed with holiday visitors...Bonner couldn't find a place to safely put down the aircraft. Losing power and time, Bonner decided his best bet was to try and land…