One of your days you do get your ID photo taken for your vetmed badge so def look semi-decent for that if you choose, since that photo will be on your name badge for all 4 years. (Not saying to dress up fancy, I just had a tshirt on in mine) but if you prefer to have makeup on for that, def make sure you wear it. I don’t remember if there was a specific time we all had to go down but I think it was just “this is the times they’ll be available, go at some point”
Def wear comfy clothes and comfy shoes for ivle though and bring sunscreen/sunglasses/a hat if you choose since a lot of it is outside. I’d also bring a bottle that you can fill with water. iirc they had a big jug (think sports team orange thing) of water for you to refill with.