Other airports in that mold to consider would be PDK for Atlanta, and FNT for Detroit (which is closer than LNS).

The big question - what to do about greater NY? If you are in some parts of Middlesex and Monmouth Counties in NJ, TTN would be an option, but not for too many others.

The big three are out; HPN is primarily for business and has Jet Blue, ISP is too far for the five boroughs, and has Southwest, even though their use of the airport has declined, and I believe Spirit as well. SWF is too far away.

I am thinking whether commercial flights can be allowed into FRG (LI) and MMU (NJ)...both have runways long enough, and I know FRG has a terminal for charter flights.