TRACY — Chris Johnson isn’t used to opening up the playbook this soon.But his Ripon High football team’s 2011 season is a month and a half away from kickoff, so when the Indians engaged in full-contact scrimmages at Steve Lopez Stadium this past week he broke out the marker and went to work on a whiteboard. “It’s funny, because coach is going like this, ‘You do this, and you go here. This looks good, let’s try it,’” said senior Jake McCreath, scratching his palm with an index finger as if he were drawing up plays at the schoolyard for effect.Ripon was one of four teams — Manteca, Lathrop and Pacheco of Los Banos being the others — that West High hosted for a full-contact camp last Tuesday-Thursday.