Are the fields open to the public or do you have to rent them

You have to book them through the YMCA.

Blanchard Park has two Bermuda turf fields and two Bahia Multiuse fields. When not reserved the fields are first come, first served if your group is under 20 people. Large groups are required to rent the fields. Call their office for more information. Bermuda fields close every few months to allow staff to fix the fields due to heavy use and damage to turf.

You've to rent them