^ California car dusters can only be used by you guys in Souther California.
Seriously, if you live where it rains, those dusters are a no go. Ditto for squeege type dryers. There are always road sediments that get kicked up onto your paint after it rains and those dusters just drag that sand over the paint. Swirl city. The best policy for cars that that see rain, is to never touch the paint when it's dry. If you absolutely must like for instance to remove bird bombs, first apply a quick detail spray to at least lubricate the paint surface to reduce friction. But generally speaking, always spray down the paint before towel-rubbing or using a buffing towel.
But you're spot on with the waterless wash. A full bucket and hose wash is overkill and can wreck the paint if you're drying the car with towels instead of using leaf blower or air compressor. If you're going to wash with a hose regularly you should at least get a foam canon so that there's maximum lubrication. Turtle wax makes a decent waterless wash at a great price although it's tricky to find.