The bus bounced along the highway from Eagle Butte, S.D., to Lawrence, Kan., covering the almost 700-mile trip in about 16 hours. Folded into one of the seats, 6-foot-10 Terrance Little Thunder tried to make himself comfortable enough to relax. It was no use. He was far too preoccupied to rest. Every time the bus stopped, Little Thunder scrambled in his seat to make sure he hadn't lost the worn-out scrap of paper stuffed in his pocket.