Trespassing

Answer:  I will address this in a series of suggestions which will hopefully provide some answers and/or approaches. First, remember that park property is private property. The landlord owns the spaces and common areas, and the residents own their home.

Answer: Your question does not mention any activity by this visitor that could be considered disruptive to current residents (e.g. under the peaceful enjoyment statute, ORS 90.740(4)(j)), threatening, or a violation of any laws, rules, or ordinances.