a quick question: local procedures FRG-HPN transition

Planning a flight tomorrow to BOS-FRG (Farmingdale, on Long Island).
My home airport is HPN (White Plains), about 15 minutes North. After
I drop off my passenger, what's the best way to get back into White
Plains?

FRG and HPN have different NY Approach frequencies, and HPN is a
pseudo class C. By the time you clear FRG class D, call the FRG
approach controller, it doesn't leave much time for a handoff to
the White Plains approach controller, much less getting the HPN
ATIS.

The one time I went into FRG, I simply left their airspace and headed
for Norwalk, making initial contact with "Westchester Approach" when I
got there (this is not entirely dissimilar to Bob Gardner's instrument
student who got delay vectors transitioning from BFI to RNT).

Is there a more direct way?


Morris