Theifs were a problem at another ramp at another lake my club fishes. As President at the time I called the Corp. Then I wrote a letter to the local sherrifs department and to the county tourism commision. The ramp started to be patroled which stopped the garbage. If that county doesn't have such a commision I'm sure a letter to any county government agency would help, perhaps human resources. Many times the local authorities are unaware of the problem. Make them aware and hold them responsible.