I'd be interested in knowing whether Terri was familiar with at least the location of the property before that day. If she did visit DeDe there did she...
...just show up and look for DeDe because she knew where to find her? Maybe she sneaked to the area DeDe was working.
...call DeDe from Fred Meyer's and have DeDe direct her to a remote (probably wooded) area of the property along/off Old Germantown Road?
...plan with DeDe to meet on the property at a certain point and time?
Kyron's house is so close to that farm it is shocking. I can't imagine living in the community and at not even knowing about it, at the least!