Weather you have to fly around or through will depend more on the time
of day or day of week not the the type of plan. It will depend of on the
controllers load of "big iron".
You only have to file with specific FSS if you are going to penetrate
the FRZ. You only need to file an IFR plan with an FSS.
Michelle

Viperdoc wrote:

Does anyone have any experience flying across the Washingon ADIZ?

I'm coming from the Midwest to the Eastern shore of Maryland next week,
which requires crossing Washington's ADIZ and B airspace.

I'll be under IFR, but I was wondering whether they sent IFR traffic around
the big ADIZ or through? If I have to go around, it'll most likely mean a
gas stop.

TIA.