12 days off minimum for lineholders, 11 for reserve. Junior lineholders not liable to get much more than that.

Depends. Recent hires are holding lines in LGA right now because the base is growing substantially, but no way to predict how long that might last. No solid word from DL on where the added E170s are going to fly, which makes a big difference.

S5 rarely has CLT overnights - the DL side doesn't touch CLT at all at present, and the UA side has only a couple flights ... EWR, and sometimes IAD or ORD ... but rarely does anything overnight in CLT. Chautauqua (on the DL side) overnights 1-2 airplanes a night in CLT. The vast majority of CLT overnights at RAH are on the Republic side ... lots of flights and no base.

4-days in LGA will go senior now that they're finally starting to get some ... lots of commuters due to (among other things) the high cost of living. Spending fewer nights in the crashpad is always desirable. Until recently, the domicile didn't have enough people to support many longer trips. That is changing.

No crew meals. Not sure what "perks" you might be referring to. LGA-based S5 pilots will have travel benefits on DL and UA, and (like all RAH employees) on the Frontier system as well. Some (but not all) of Frontier's pre-merger ZED agreements have expanded to include all RAH employees.

Commutability depends heavily on where you live and the flight schedules. The trips haven't been commutable but that may change as the domicile grows ... some seniority should allow trips (or sequences of trips) commutable on at least one end. LGA has lots of flights to lots of places (to say nothing of planes, trains, and automobiles to JFK/EWR) but no FedEx or UPS to help you out of a late-night jam.

Good luck.