what I have done is dress it right away and pack the cavity with as many bags of ice as possible and then wrap the entire body with a tarp as tightly as possible and tie it down with rope so it does not unravel and keeps everything nice and contained. Then I put it in a spot that sees constant shade until I leave to go home. The butcher was amazed at how good the meat held up with this method, he said there was no spoiled meat.