During a camping weekend, a group of friends team up to build a 10 x 12 foot tent platform along the creek. This was a full day project for a group of 6. The most intense labor was in moving the materials and hauling stone for the pillars.
Step 1: haul the materials up the steep mountainside in a caravan operation
Step 2: build and level the stone pillars (who knew there would be a skilled stone mason in the group, how fortunate!)
Step 3: square box frame
Step 4: apply decking