You can find all the info you need on public hunting on the TPWD website.
Trying to get permission from landowners to hunt private land in Frisco/McKinney would be a complete waste of time. It's just not gonna happen unless you know someone with a connection or pay for a lease through an outfitter. Too many guys looking to hunt, and not enough land to go around.
"God made man, but Samuel Colt made them equal."