I hunted RSA my first time in May of 2023. There are basically 2 things I would say are absolutely necessary.
1) Practicing off the "sticks".
2) Studying shot placement.
As long as you have enough rifle and good ammo? You do those 2 other things and you'll likely be very successful.
Don't get lost in the weeds with a practice bipod/tripod. I had a Primos trigger-stick tripod at home I was practicing with. Everyone told me "get this" or "get that." It was usually some iteration of a hard-to-find African shooting stick that online small-shops wanted a fortune for. I got to RSA and wouldn't you know it: My PH had the same Primos tripod trigger sticks. I just recommend getting a Primos trigger-stick tripod for practice and call it a day.
Also, shooting animals off of sticks vs. punching paper is actually way, way easier. Punching paper off sticks you'll get target-fixation in the sense you will be over-aiming at the black/bullseye. When you actually put animals in your sights off the sticks, it's actually must less frustrating than chasing groupings on paper. That critical-kill area is actually much bigger than trying to stay on the money with a 100 yd rifle target. Before I left, I had 2-4" groupings at 100 yds off the sticks on paper. I didn't think it was enough. It was more than plenty.
My biggest advice for practicing off sticks/tripod is come up with a repeatable process to set up. Your PH will set the sticks and they quite damn good at it. Every time my PH did, sure enough, that rifle was right at my shoulder height. Rehearse how you will set up on the sticks in terms of hand/finger placement on the rest. After that, work on your breathing and most importantly (IMO), trigger pull. You want to "drag" that trigger back. Don't yank, don't pull, slow drag into the breakover and boom...
I over-practiced (if there is such a thing) and cleaned up when I arrived in RSA.