Jaked, thats what you would do, and its about all you could do, if you were setting that bike up for any and all riders.
You could set preload more specific if you knew the weight of the rider. Being he was setting this up for a group, its a good baseline.
I also recommend really using your adjusters. Instead of one click, give it five to prove your on the right track..Its way too easy to give it one click today..one tomorrow..one next week..one next month...and drift away from what you were trying to accomplish in the first place. Dont worry. On a stock system, you are not allowed enough adjustment range to do much.
Like sighting in a gun. You wont notice one click. You will notice five. Then determine better/worse.