Those are all pretty low torque values, so a 3/8-drive will almost certainly be adequate. If any of those bolts or fasteners are too large for a 3/8 drive, you'll be saving money if you just get a 3/8-1/2 adaptor.
The only reason you should have to buy a 1/2-inch drive big-stick is for the higher torque values (40Nm or greater (which are seldom found on a bicycle.))
And shop around. I don't know what Park charges for them, but check your local Sears and/or hardware store.