Update Jan 2024:
You can now drive into the park and use the parking lot by the county rail trail. I assume you can use the picnic grounds also; however, a permit is required as far as I know. The bathrooms are NOT normally open.
They are doing some construction inside the grass field area - which is currently closed to the public. I believe they may be putting in the playing field lighting.
Status as of July 2023:
Redmond field is still under renovation and not yet open to the public. There will no longer be softball fields. I believe they will have a Celtic football field enclosed by fencing and Stadium type lighting. You must have a city permit to play on those fields. I believe the other areas of the park will be open to the public once the field is finished. There is a renovated, Pavilion picnic area with grills for use by permit only. There are also new bathrooms; however, these are not generally left open unless the field or picnic area is rented.
The two pictures posted were from a city meeting and are the artist rendering of the plan.