Not that I know of...there's no admission fee or checks at the gate. Once inside, unless you are doing something to draw attention from security I doubt if anyone would notice you. There are cameras everywhere.

Yes, it probably will. Winter in DC is frigid and cold, and most people dont go on weekends in winter.

You should be all set. School buses go in and out. Be sure to get your parking pass online before you go. You can not get same day tickets right now.

Scott S is correct, reservations can only be made within 30 days of the intended visit.

No - it's free...you just walk in.

Hi, I believe the National Zoo in DC is open 364 days a year. IF I remember correctly, the only day they close is Christmas Day.

There is a new free zoo shuttle bus from Woodley Park Station — so definitely use that metro station. Shuttle will stop in front of zoo and inside it. You can return to metro from either stop (shuttle will operate through end of September 2019 at this point.)

It's free- but getting there or parking costs $

$20 to park and it’s free to enter the zoo. Do the math with the number of people in the car what’s it end up costing you to go to the zoo.. 4 people $5 bucks a person. I can live with that. Pay the $20 to park.