Here's a map to help...

Next we have Chalco Hill Recreation Area

The red star shows where the entrance to the park is. Once you enter the grounds, turn right at the first stop sign. The "Near Fields" will be the first right after that, in the first side picnic area. Look for a small shelter and a playground area. The "Far Fields" will be on the same road, as far back as you can go.
Lake Zorinsky

The stars show the two parking areas, one north, one south.
Lake Cunningham

The star shows Gate 2..