I would assume there will be a lot of activity/non-sleeping going on with so many people and snacks and drink (one is supposed to eat every 6-8 hours) so I would just take a bottle of water, wear comfortable "street" clothes (jeans/jersey) and take your meds when you needed to (anyone asks what they are, you reply, "just my regular medicines", and smile and then keep taking them, don't "stop" to see if they approve/disapprove) and nap/rest in your regular clothes so your scars don't show, etc. Otherwise, just take them on a bathroom break.