So, property rights supercede constitutional rights?
Property rights ARE constitutional rights. You cannot exercise some constitutional right by trespassing on someone else’s private property.
Your right to keep and bear arms extends as far as you have the right to be wherever you are keeping and bearing arms. If your permission to enter my property is contingent upon your leaving your firearm locked in your vehicle or checked at the door or whatever, you have the right to comply and enter my property legally, or you have the right to go somewhere else. But you don’t have the right to enter my property in violation of whatever conditions I may choose to place upon such entry.
Your right to peaceably assemble with others also extends to your rights to be where you choose to assemble. You can assemble on public property, or on private property where the owner has granted permission to assemble. But if you decide to assemble with a bunch of like-minded friends on a location where the property owner has denied permission to enter, then you are trespassing on private property - your constitutional right to peaceable assembly notwithstanding.