Registration goes quick, but if you pay attention, you can usually get in first go.
It is tough on gear, budgets and person.
If I were to give advice based on prior years...
1. Take a sub-MOA precision rifle for the 4 gun stage.
2. BUY a MGM spinner (12-20 yards) and practice with pistol, shotgun (bird to 20 yards and slugs to 100 yards) and rifle (80 to 120 yards).
3. Take an AR you don't mind thrashing and be prepared to re-barrel it if it already has a good number of rounds on it. AR precision is not usually at a premium in this match, except if you use one on the one stage that allows a second rifle.
4. Have your night-time, hotel bed cleaning procedure down pat.
I have seen lots of approaches to Trooper. If I were to try Trooper, I would likely go with a 9mmAR, a 9mm pistol, a 6 or 6.5mm AR-15 and a tube shotgun, but I have not ever tried Trooper, so don't take that as a recommendation per se.