I work for a "smallish" local race that would like to have a backdrop that photographers could use to take shots of finishers after they complete the race. Ideally, we would like the backdrop to include our race logo. I've seen this type of set-up at many of the big races...and am wondering if anyone has advice about the best way to set-up one of these backdrops (e.g. materials used, how big it should be, do you buy it from someone or create yourself, etc.). Thanks!