Is there a place for handicapped parking so that we do not have to cross Renner or Plano Parkway? His electric wheelchair is not too fast and must navigate speed bumps, etc.

Yes, there's a parking lot on the corner of W Renner Rd and N Central Expy. search on google maps for "spring creek nature preserve parking lot".

2929 Central Expy, Richardson, TX...there is a handicapped ramp there with wheelchair access.

Spring Creek Nature Preserve Parking Lot Spring Creek Trail, Richardson, TX 75082 https://goo.gl/maps/Y6vpaRgfjz7GLCTX8

If you take Ave K pass Renner crossing about a block after there's another park entrance to your left next to the play ground.You can park there and if you look carefully you will see a paved trail going down towards the park.You can use the wheelchair.