Walk, Bike, Driving Yourself (free parking on site), Shuttle or Uber
Yes, Arroyo Seco Weekend offers free shuttles from Parsons Parking Lot B to the festival each day. The shuttle runs continuously from 10:30 am to 8:30 pm going to the festival and from 7:00 pm to 1:00 am headed back home.
Last year for Arroyo Seco we took the shuttle one day and drove ourself the other. If you have a sober friend willing to drive parking was easy and free, so it's a great option. Traffic going into the festival (at least early) was a breeze so we had no complaints. The shuttle is also convenient as it is free and can be easily accessed by using the Metro Gold Line. You can take the Gold Line to Memorial Park Station and from there have about a 10 minute walk to the free shuttles. The Metro runs into the night so it is a viable option both ways. If you have a sober drive go with driving but if you want to enjoy adult beverages the shuttle was very convenient and ran efficiently. Of course, if you are close enough to walk or bike those are always a great option as well.
Free if you drive or take the shuttle. If you Uber expect surged prices at night.
Yes, there is free parking on site at Arroyo Seco. We experienced very little traffic going into or leaving the parking lot, but admittedly we went to the festival early and left a little before the headliner wrapped up.