I posted this a few days ago to someone else.
Ped tires should come off as easy as bicycle tires. Bicycle tire irons work just fine. Be sure you begin to remove the tire near the valve first and make sure the opposite side is in the well of the rim. When installing tire, begin opposite the valve and finish with the area close to the valve. Again, making sure the tire is pressed into the rim well.
On my way to BBQ5, 3 peds, 90 miles one way, we had one flat in a rear tire. I did not even remove the wheel. Just popped the tire off one side of the rim, pulled out the tube, patched it and put the tube and tire back on. Took about 10 minutes.
If the insructions are not clear, try to find someone who has repaired bicycle tires to show you how.