I have found that 87.5% of your estimated third is a good opener, 95% of it is a good second, and then of course 100% is a good third. This is assuming you have a realistic shot at the third attempt, don't expect to lift another 100 lbs just because you are in a meet. So that would put you at
Squat - 385, 420, 440
Bench - 315, 340-345, 360
Dead - 490, 530, 560 - if you are worried about energy on deads you can 82.5%, 92.5%, and then 100%
I really like 100% Raw and lift with them all the time. I actually had a lifter do almost your exact planned squats in a recent meet, I am attaching a link so you can see the form and commands, etc. This was a USAPL meet so it allowed knee sleeves but it is basically the same thing. Of course make sure you can do a nice long pause on the bench and all of that good stuff. If you have other questions let me know, good luck with it (this meet was this lifter's first full meet as well). Your numbers are pretty good for raw so you should do just fine if they are realistic.