As Haines Borough Government Affairs and Services (GAS) Committee members decide whether to change code to allow a fourth heliski operator in the borough, they have to weigh a variety of concerns: skier safety, environmental impact, neighborhood noise and the industry’s needs. But a researcher in the Lower 48 says a major obstacle stands in the legislators’ way: there’s little data to inform them how their decision could impact key aspects of the heliski industry,…