That would be possible, IMO, for a couple of reasons. Reason 1 would be so she could blame ZG after the "kidnapping" at Blanchard park. Reason 2 would be so she could blame the rapist/killer of NG (who is still at large).
IMO Blanchard park is just coming up entirely too often to be meaningless. KC isn't a great liar, but most of her lies do contain an element of truth and she has a reason for every lie she concocts. I think her later lies are also going to be getting closer to the truth as her fear increases. If she is feeling that investigators are getting closer to Caylee she will need to legitimize her presence in whatever area the body is. I believe she will attempt (or has already attempted) to do this because she doesn't know what all the cards they hold are. She doesn't know if witnesses have come forward, if there was CCTV in the area, ect... She will place herself nearby in an effort to make her presence there legitimate. I think she already has made those statements when she claimed the kidnapping was at Blanchard park. It would be interesting to compare the kidnapping statements she made to LP with the date(s) of the searches. Did she make those statements at the time they were searching Blanchard park? I think separating the strands of truth from her lies is going to potentially solve this case.
In addition the area is somewhat secluded but has parking nearby so it would be easy (lower risk) to perform a dump.
I know that Blanchard was searched early on, but it is a large park and I think they need to go there again.