1/3 way through - only reading time I've had was an hour at the tire shop and the bus ride to work this morning.
Thoughts so far:
I like the explanation economic/market conditions of the team during the "milk run". There's a lot of gray area between "normal" and "apocalypse" with regards to retail inventory and prices.
The characters are starting to develop a bit. More people (besides Nancy) need to lose their sh#t and freak out to add some tension to the plot, but I presume that will happen with time.
The food logistics don't seem solid. How many deer steaks does the neighbor lady have? If I had 60lbs. of meat in my freezer, I'd feel reasonably stocked for my 4 person family, but feeding 15 hungry people dinner each night, that wouldn't last long. How is Grant keeping the stash of guns, and to a lesser degree the stash of food preps hidden from the group? I've personally hosted holiday dinners for 20 people, and basically our entire fridge + garage freezer was dedicated to ingredients for that single meal. You'd need a secret barn, not just a spider shed to stockpile the quantities in question.
Maybe I didn't track the end of book #2 as well as I could have, but it seems like the government went from a fiscal crisis to LA Riots + Hurricane in barely a week. I get the angry entitlement mobs, but we jumped from that to NorthCom leadership defecting to the Republic of Texas. Seems a stretch that people's mindsets could transition so far so quickly.
Would it be possible for you to sketch out a Visio diagram or similar for the Pierce Point layout? Obviously don't violate OPSEC, but my mental impression from the previous books is wrong. I mentally pictured a few acres with cabins and out buildings, but given the head count, and geographic features described. I realize this can't be.