The start low, finish high is for someone who wants to get a LOT more smoke. Adjusting temps is common, but not a requirement.
It's your smoker now, go with what you want/need. But it's a new type of smoker so there is a learning curve
Don't over think it (I know, you won't but SOME new owners seem to)
Go with one or both (don't put chicken above the ribs, poultry should never drip on anything else).
For ribs, put St Louis trimmed spares in at 275 and pull at 4 hours to see if they're done.
Do NOT stress over the first couple of cooks. I personally think sometimes we focus on the littlest of details. Cook a couple of times, season it and let's see where it goes.
good luck, let us know how it goes.
Smokin'