Wheeldog, I had to put my loader on this morning to move a pallet of bricks and one bucket of dirt, then took it off again. I don't stop and start the engine as much as you do. I raise the loader boom high enough to dump the bucket forward approximately 20 degrees (and the exact amount ain't too important; in fact I probably dump it closer to 40-45 degrees), lower the boom to put the lip of the bucket on the floor (actually I have a piece of plywood on the concrete shop floor that I put the bucket on) and raise front wheels slightly (really just get the weight off of 'em), leave the engine running (gear selector in neutral), get off, remove the springpins (that's what the manual calls them; different from cotter pins), rotate the park stands down, and replace the springpins (in a different location, of course). Then I remove the springpins and mounting pins from the loader side frame, and roll the bucket back until the loader side frames rise up and out of the receiver of the main frame.
At that point I shut off the engine and move the joystick in all directions to relieve any pressure in the lines. Then I disconnect the hydraulic quick couplers, get on the tractor, start it up and back away.
However, I think you're right that the manual says to start and stop the engine more times and of course it says to only start the engine or move the joystick when you're sitting on the seat. I think I'm about as safety minded as most, but since my shop floor is level concrete, I only kill the engine once and get on and off once. It takes me the better part of 2 minutes to remove my loader or put it back on.
Bird