I have done two busy 24/7 gas stations and have one more coming up in the last couple weeks. I go mid-week and try to work between the hours of 11pm-5am, seems to be the slowest. With gas stations 5am seems to be the first morning rush of people who work early. Definitely cones/caution tape and I use my vehicle and trailer to block areas and protect my equipment (hoses mainly). I try to stay more alert for people walking in my work area too because people are "stupid" and will walk their nice dress shoes right into your 5gpm spray; then try to blame you after they stepped over caution tape, cones, and puddles of water to get to you...