Drive over to Thousand Oaks to Coast RV and pick up what you need/want. Nice store, nice folks. I have a flat white hose that the OP bought in 1990. Coils about 1" thick and 12" diameter. I replaced the ends with Gilmore repair ends and other than scratches on the surface of the hose it's fine.
Unless we are staying put for three or more days, I use the water from the tank. I agree about the regulator going on the spigot and then the hose. Only problem I know of is you might forget the regulator and then it gets sold for $2.00 as used in the store.
During the last year or so I've seen a lot of "Y"s and regulator in campground stores. Never seen an adjustable regulator with a gauge in the store. Maybe for >$50 folks remember those.
