Not a problem. You look sorta professional, with a safety vest, badge, and a strange looking instrument. Some come out to question you, but just explaining that you are doing a SAFETY inspection, It calms most people. Then some interesting conversions start. I've meet some really cool folks. For yards with fences or dogs, you make the decision if you go in or not. Most times I will knock on the door and explain, or make noise to judge the dogs reaction, and maybe just walk on by, and make a note for the gas company to follow up.
Give it a try, you might like it. If not, you just quit. No obligations.
Mark