It depends on how many competitors and how much equipment there is..but
"generally" speaking, women's class goes first and then open weight classes, then they would go 175s/200s/231s/265's and so on...Then the Pro's last..
They usually would setup one event, Overhead presses are always first so if you are all doing a log or axle, you will likely all go at once...So you will do your lift and in many cases you may not do an event for another hour or so..
So my suggestion is to bring a ton of snacks, food, etc...Bring drinks, water, stay hydrated...Many guys will take a small preworkout just before it is their turn at their event..and then preworkout again at the next..It can be a long day if there are alot of people..
Johnny's good though, so likely he will have more then one competitor going at once, aka multiple equipment.
Stones and such are last usually...
Whoever places the best in one event, gets to go last on the next event..Use this as a strategy if this is you..So let's say you go on the log and destroy everyone and you are in first place...The next event, lets say it's deadlift, you get to go last...So watch what all the other competitors get. Lets say the top guy gets 15 reps and you know you can do 30. Do 16 and walk away...If you are not in that position then you need to go all out each event, don't leave anything in the tank on any event, you will have plenty of time to recover in between events and regain strength and energy..
Again eat and drink during the contest, this is my number 1 suggestion, but most of all have fun, socialize and have a blast, it's an awesome time, and I would assume after doing one, you will be hooked.