1.

Deliver an object to yourself. 

Go to any part of the drive inside the park (f.e. the entrance to the south meadow) deliver an object to anyone that walks on the drive in one particular direction and give him the next instructions:

"carry it until you leave the drive, at that moment pass it to anyone walking on the drive in the same direction you were walking, and give hime the same instructions"

Wait until the object returns to you

2 (txt).
deliver: Anywhere arround the drive deliver an object to anyone that walks on the drive in one particular direction and Wait until the object returns to you