If I bought it before I'd still be buying weed once per calendar month, but I wouldn't be buying a bag much later than the last one (at the end of February) so there's possible tolerance to deal with.
If I waited till after, everything would be cool but that's well over a month without pot, plus if I bought it after I'd be contending with people buying shit for 4/20. OTOH if I go into DC after the festival (ending on 4/11) I might still beat the 4/20 rush, and have a fresh, full bag for the day, to boot.
The spot I have it delivered to is two blocks off the Mall and near the Tidal Basin (where the big grove of cherry trees that you see in the pictures is).
Right now I'm planning on going before the festival. Advice?