Same area as number #2, but this one has to do what you’re wearing. It’s important to look presentable, but I wouldn’t recommend that you wear a suit or any tight clothes.
It’s important to look neat and clean, but this does not require a suit. Canvassing can be four hours sometimes six hours in a day. The last thing you want to do is drown a good suit in sweat. As for tight clothing, you’ll discover after a couple of hours you start to feel constricted.