Here is my opinion. I hunt thses strips also. If it is a strip that sets in front of a vacant lot I generally will hunt it untill I am told not to. Which has never happened. If it is in front of a house. GET PERMISSION. It may belong to the city. But..... if old grandpa joe has been cutting the grass on it and planting trees and plants on it for the last 25 years. You can bet your going to have a battle on your hands. Even if it belongs to the city, grandpa joe don't want you there, he is going to call the police everytime you show up. The police have to respond. Sooner or later they are going to get tired of you and have a come to Jesus meeting. Belive me looking at it from the police side, its a lot easier to get permission. Just use common sense. IMHO
By the way! Great finds!