>>phyllis swanson/forest "we're shocked, very shocked and disappointed." >> reporter:over the weekend the u-s forest service estimated about one-thousand college students on over 60 house and patio boats came to this island.leaving it trashed. >> reporter:phyllis swanson with the forest services wants to find the culprits. >>phyllis swanson/forest services "we are hoping to maybe make contact with these folks and do a little bit of education." >>cristina davies/reporting "she says this happens every year where college students come and party and when the weekend's over there is a whole bunch of trash. but this year is different they left shoes tents and clothes." >>phyllis swanson/forest services "it's sort of hard to understand why it was left." >> reporter:university of oregon bags.hats and sandals. left behind. i even found a couple ice chest with fraternity letters on them. >>phyllis swanson/forest services "there is a lot of stuff here left that the wildlife shouldn't be getting into." >> reporter:i reached out to the university of oregon. they say quote. "the manner in which the