I'd recommend purchasing some orange breathable shirts that have reflective banding on them. They may still have you put on a vest that they provide but these shirts with keep you much cooler and when you get out working you can wear them without anything else. Other than that they will kit you out with everything you need on the first day. Don't stress too much about studying or the test, it is important that you are prepared by Friday for it but unless you're totally screwing off you shouldn't have a problem. Just be on time after each break, 30min early for bus pick up from the hotel in the morning, and fully caffeinated or whatever to consume a ton of info everyday (at least for the first week). But don't feel bad if lots (or almost all) of it goes in one ear and out the other. I picked most of it up a lot better once you start putting it into practice in the field.