Thanks for including soda pop! My suggestion is to stay on strictly water prior to the test. This is what they (college guys) were advised by the team physician. The decent plan is based on they can certify on any given day up to qualifiers. Like most guys they will challenge all the way through the season for varsity time at the given weight for that prematch weigh in. They are trying to establish what weights that they can wrestle all season from start to finish. You may do time at higher weight for one set of duals then a lower weight a couple of weeks down the road. The NCAA approves the print out.
I would have to agree with Egg on the fact for a HS kid to be under his normal alpha weight by a couple pounds would be self-defeating based on the 10% rule. If your really fat then most physicians will release you any way if you have the weight to lose. To the older guys it’s all a numbers game.