Mike,
I'm just a little more seasoned than you on the 009 as I received mine a few months ago, but this comes from a couple smokes with loin (baby backs).
1. I'd season overnite. Sounds good.
2. 2-3 Chunks of Hickory? I'd get a little scale and weigh the wood. It can be deceiving. From my baby back smokes, hickory is real strong. Used 4 ounces on 3 racks total, and it was too much. Personally, I'd do no more than about 3 oz. of Hickory.
3. 3-4 Hours? Depends how you like your ribs. From my two smokes of baby backs from Sam's, I'd plan on 5 - 6 depending how tender you want them. I personally don't think 4 hours will get you where you want to be.
I just did some spare ribs Saturday, and cooked them 7 hours, they were about 3 lbs. per slab. MAn, they came out perfect. I used Apple wood on them, a much milder smoke.
Hope this helps and won't confuse you. Just don't look at the ribs before 3 - 3 1/2 hours. Then, just keep an eye every hour on them to get them to where you like them.
Happy Smoking,
C'Nooga