Well, if you're talking high school, AF is a great choice (my wife graduated from there in 1991). But Lone Peak isn't bad. I'm sure there are Oxy problems at both. AF does have an awesome band. I lived in South Jordan for my first year when we moved back to the city from southern Utah. I liked it a lot.
Driving over the point of the mountain at 7-9A and 4-6P every day sucks. A lot. They're widening the road right now to 6 lanes each way, but it's a big construction mess right now.
For state taxes, they take your Federal AGI and multiple it by 5%. This gives you the tax amount. Then there are some exemptions which are added to your federal standard deduction or itemized deductions. There are also some income-based phaseouts.
After deductions and such, my tax rate was 4.85%.
Don't know about the trust, although I do have a Utah-based NFA trust.
Now having said all of that and as an active LDS family, I have to say that Utah Valley (Happy Valley) is one of the weirdest places on Earth. Concentric circles of weirdness radiate out from BYU ("where the campus is our world"). I would go crazy living there.
I'm in Draper.