I don’t specifically want a small maze, but I think that being able to pop up an “indoor” space anywhere at a venue is a great asset for a larp. Whether it represents a tent, a building, whatever.
You may be right about the advantages and price of gazebos.
It’s hard to go past something like this 3x6m black gazebo with movable interior walls and adjustable height for AU$220:
Exactly the kind of thing I was looking for about a year back.
Far more portable and storable than making our own in PVC too, it packs down to a smallish carry bag.