Stayed here two nights without incident. There were many other folks here, more so hobos living out of their car than travelers. even tho it says you need a permit seems like the cops or whoever leave everyone here be. Just be aware, it's right on the train track and arriving/passing trains will blare their horn. Only had 1 train go by tho. Def feels like I could stay here for many days without getting hastled. Lots of shops and restaurants nearby. On Google maps this is named: "San Luis Obispo Amtrak Parking - Lot A". But Wouldn't park in Lot A, it cleared out as sunset came. Tho it does say 10hr limit so it might be okay.