From the Hardly Strictly Bluegrass website:

• We have added fence lines. Enter only at these four locations. Click here for a map.
  1. JFK Drive and Transverse Drive
  2. Fulton Street and 30th Avenue
  3. JFK Drive and 36th Avenue
  4. South Polo Field
• Do not bring coolers, they are no longer allowed. We have updated our concessions in anticipation of increased public need. Click here for a list of vendors and new offerings.
• Any bags/backpacks must be clear plastic, measuring less than 16”x16”x8”.
• Entrances will not open until 9am.
• There will be increased SFPD and Tactical Unit presence inside and outside the venue.
• Blankets and short backed chairs (seats no more than 9” from the ground) are allowed, but will be subject to search.
• Any restricted or oversized items will be turned away at all entry points.

http://www.hardlystrictlybluegrass.com/2019/updates/