Do some scouting and knock on some doors and politely ask. Can't hurt, maybe you will get a yes from a farmer or two. If I could make time that's what I'd do. I will probably just get a machete and a gillie suit and hide in the tall grass across from my office, there was 41 yesterday morning.
You could probably do the same on Hwy 280 from I-459 south. JK
In all seriousness knock on some doors.
David