Hi, OBE! Nice to see you posting here!
Yes, there are definitely rattlesnakes here. I wondered if Barbara had gotten bitten by one, and expired, as well.
When she passed, I believe she was wearing "hiking boots". When I think of hiking boots, this is what comes to mind:
KEEN Targhee III Mid Waterproof | Zappos.com
The above link shows ankle-high hiking boots. Just my opinion here - I don't think think ankle-high boots will completely protect you from snake bites.
We've got friends who have property in the high desert. When I asked them what they wore to avoid snake bites, he told me Kevlar pants. His wife wears thigh-high boots.
Last time we saw them, they were talking about the Mojave Green rattlesnake they saw (and did not disturb!).
JMVHO.