We're headed up to DC on Friday for a long weekend with our well-behaved 8-year-old son. Staying at Embassy Suites in Penn Quarter. Since this is last minute, I could only get a reservation for Central on Sunday (we've eaten there every trip and love it). We'll have to do walk-in on Saturday night and are thinking about Oyamel. Will there be a crazy wait? I'm OK with 45 minutes to an hour, assuming we can get a cocktail or glass of wine. We're also thinking about Ella's for dinner on Friday since we'll be late getting in. Will we be OK without reservations at both of these places?