I just reserved my parking for BronyCon 2019 with SpotHero and got a great deal! Parking from 5pm Friday night to midnight on Sunday (they extended the time longer than I needed) for $27!! It is a garage about 2 blocks from the Convention Center and you can't move your car during that time (one in and one out only) but that's okay because I have a hotel room for Friday and Saturday nights!
Anyway, I just wanted to give a heads up that it might be a good idea to plan ahead for parking. Especially since the Orioles are playing at Camden Yards ALL FOUR NIGHTS OF BRONYCON!!! (Well, Sunday is an afternoon game) So parking will go fast! And the deal I got is cheaper than the hotel garage. Also you can change or cancel it up until the reservation time.