I can understand the want for protection. Myself being shot at literally targeted at 4 times during my life. All out of the blue and all in what was considered safe places.
The last time I was fishing in my Pontoon and although I had a sidearm I did not return fire. Being 50yrds at least and myself in a Pontoon boat with a handgun and they with long arms I played dead. It worked. Law enforcement took 3hrs to respond.
They were arrested two months later taking random shots at drivers passing by and grazed a passenger in the neck.
A not so much bullet proof, but reinforced or padded area will be going around my sleeping quarters after reading this post.
Most likely my books, water containers etc. A nice somewhat buffered safe spot would be a comfort to me sleeping in the forest.
I will now also add trap doors leading to my basement storage areas for an escape access.
Fwiw.
Layers of anything will help plywood, fiberglass, books, water jugs, etc.
There is no feeling quite as humbling as being shot at and dropping forward, head down knowing your done for. Meanwhile staring at your . 45 knowing that an attempt at return fire would unleash all heck in your direction.
All being said I have camped literally years in the outdoors. Imho being shot at randomly is the very rare exception not the rule.
I consider being outdoors with just a sleeping bag safer than normal urban living with locked doors. Statistics are with the nomads. Many hear gunshots every night sitting on their own front porches.