Talk to some rock climbers. There are quite a few who live in vans (sprinters are popular) and I know some who park with permission in their climbing gym lots. No stigma in the climbing world for van life, some enjoy it! Check out some climbing magazines for articles on vans and van life. But fair warning, they don’t call each other dirt bags for nothing You will need to be careful the van doesn’t get too hot in the sun, it could trash your instruments. Good luck!