I have friends flying for CalFire and also firefighting in the northwest. Police ISR, medevac, or have flown contracting for state and fed government. Long line work, overseas support (both mil and civ stuff). There’s more out there.
Using firefighting as an example, depending on region you might only fly from April-October so the rest of the year is yours. I have a buddy who lives on a diveboat in Palau during the off-season.
Lots of options out there. The caveat is I don’t know of any that pay what you’d make after a few years in the airlines, but you can live pretty comfortably.