Welcome glassman84! This is a good site with a ton of super members who don't mind sharing just about anything concerning sacs. Old timers and newcomers alike are generous to a fault.
As far as spots, I've caught in the morning and came back later in the day and did nothing. Sacs move a lot and do get picky. One thing for sure is that they like to hit upward. So if you're below where they're holding, chances are you won't get a bite.
I live in Plaquemine and like to fish the Shell cuts in Sorrel. Pigeon seems like too much riding for me. But when I decide to go there, I usually start in Cross Bayou up to Murphy Lake and Indigo. There's a canal at the north end of Murphy that turns on at times too. Just watch Murphy. Silted up like a lot of the old spots. That's the first place I grounded my rig when I bought it. Like you, I was without for about 10 years and a LOT changed from what I remembered. Best thing I've bought was a side imager unit. I use it to find that structure you can't see from above.
Jig Rig is a good resource for Pigeon. He calls it Disneyworld in his posts. Right now the water is rising a little so bite is off and most people are fishing "inside" such as Jack Miller's area and around Verret or Lake Natchez.
I've attached a good pdf of a file I found a long time ago. Lots of good info on sacs. Take what you need and discard the rest.
Tight lines,
Paul
CRAPPIE.pdf