RAY LAKE—There was a lot of giggling in the parking lot as teenagers plunged bare hands into coolers filled with small, slippery rainbow trout fry. The objective was to catch the fish in clear plastic cups, but the juvenile trout were fast and very squirmy, and the effort elicited shrieks, splashing and laughter. The kids — middle and high school students from Fort Washakie, Wyoming Indian and St. Stephens schools — were pretty comfortable han…