we live in California, the only holiday DS gets between Christmas and summer is a week spring break, 2016 it is the penultimate week of March, so we want to go on holiday within the states as it's cheaper than summer and winter.
This year we did NOLA for 8 days which was fab.
DC will be 4.5 & 7.5, so family friendly, not averse to camping but I'd rather get a good 8-10 days away so prob likely to do Air BnB style accommodation. Not California, not too cold (we don't own winter gear anymore), mix of culture and museums and half decent playgrounds and outdoorsy stuff, we're pretty open to be honest. No theme parks.
Shoot!