If you want a walkable/every 15 minute shuttle to LGA, Parkwhiz at the Aloft is $25 a day if you book it over 24h out.
$35 a day if you get day of (just swipe card at gate)
I have been having to drive a lot more as they went from 13 flights to 5 where I live, and its really 3 attemps because JFK and LGA go within 20 minutes of each other, but still use NEPP. I will often park at my crashpad and uber to the airports, but my last trip I got in at 1400, so if I got in the car and hauled I could get out before the Triboro, Harlem River Drive and GWB got insane. And being that I had already maxed out NEPP for the month, the $50 to park for a 2 day would have been cheaper than Uber to/from Ozone park even if it wasn't a get out of town before rush hour hits move.