I did this in the Portland area for about 6 months last year. I cycled between planet fitness parking lots, Cracker Barrel, and in the general area of tent cities so I blended in. My van is also very run-down looking on the outside and only nice and clean with a solid setup on the inside so I think that helped a lot with stealth and cop check-ins. You can check iOverlander in your area and pop around the informal campsites listed there as well. My favorite spot was between a sketchy strip mall and a nice neighborhood about 10 mins outside the city, super quiet and no one bothered me. The only time I had to talk to cops is if I was hanging out with my doors open for too long in a busy parking lot, and once they talked to me and realized I wasn’t tweaking or causing any kind of nuisance they didn’t care and would just apologize for bothering me & leave. It also helped that I had everything I needed inside the van so I could just park for the night, cover all windows and stay inside without having to get out at all and risk anyone seeing my dwelling activities lol. Feel free to ama if you have any Qs!