Im no expert, but dress up very proffesionaly, I went in in Slacks and a formal shirt and no one ever suspected a thing, but the guy before me was dressed in his construction clothes (not dogging on construction, as I used to work it but we get dirty and wear old clothes) but it will draw attention to you. He had 3 old ladies watching him like a hawk while I walked up in that bitch and subbed out, then toked a joint on the ride home.

At least in my opinion it is an extreamly good idea to look exactly like the last person you would expect to sub, thought id mention it because alot of my friends aren't that smart and they've been caught lol

Edit: oh and practice with the temp, I didn't and nailed the temp anyways (probably because Im awesome, and I hadn't smoked yet) but I realized how unwise it was on the ride home as I could have f'ed myself and then had to pee dirty!