I hunted Spain, and then toured around for 2 weeks afterwards. So glad I left my rifle home. If your gun is stolen in Spain, you are 100% responsible for anything & everything that happens with your rifle. It's a serious crime.
Having said that, I could have easily chained it down to the rental car back seat, and drove around for 2 weeks, and no one would have known the difference. Just like here in the USA when I hunt, my rifle is chained down in the back of my truck with a literal lock and key. I have a steel cable lock. I heard too many sob stories. I take it 1 step further and cover it with a black sheet.
all in all, if I ever hunt Spain again, I will use the outfitters rifle again. He had all magnum ridiculous calibers. I told him no.. so he prepared a .270 with a Leupold. I made these arrangements in advance.