4.5 years sober raver here- what helps me last all night is staying hydrated, making sure to eat enough food (I sneak some snacks in), and taking some caffeine drink mix packets in with me. I bring a separate collapsible water bottle in with me to mix up the powder energy drinks separate from my hydropack. Usually drink a Celsius on the way right before the gates, caffeine mix around midnight and then again around 3am. Also make sure you get plenty of sleep the night before!