When camping in rural North Macedonia, I keep my food and some toiletries in a dry bag more than 30m from my tent, to avoid any hungry bears coming into my tent. I put the dry bag into a drably colored duffle bag (so it is less of an eyesore/attracts less attention) and hang it on a tree just high enough to avoid any foxes getting it.
This morning I was disappointed to find the bag still hanging in the same place, but with some items outside the dry bag and in the duffle bag. Inside the dry bag, which had been opened but not damaged (I don't think an animal could open it without damaging it because I fold it over several times before clipping it shut), a cup of yogurt was punctured in two places, and everything was covered in yogurt. There was an additional spoon in the dry bag which wasn't there before. 150g of meat toppings in a sealed packet were gone. 150g of tinned tuna was gone. Toothpaste and a small bar of soap (which I'd received from a landlady in Sripska) was gone. Two bottles of suncream were gone. Some items (eg 500g bread, cheese in sealed packets, toothbrush) were untouched, and I was not disturbed in my tent.
It seems obvious to me that somebody nearby is not happy with me camping next to this gravel track. I only noticed one car driving past yesterday evening and this morning (going out and returning), so maybe that's who is not happy with me. My tent is not visible to any houses or parked cars round about. A dog was barking at me from perhaps 30m away when I was using my torch to help me set up the tent, but stopped barking when I switched all lights off. The nearest house is up to 100m away but completely obscured by trees, and the dog can't see me during the day. It doesn't look like I am in the personal space of any house here, but of course the land probably belongs to somebody.
What is now the correct course of action? Should I go to the nearest house and ask if they opened my bag, and if so to return my meat, tuna, toothpaste, suncream, and soap please? Should I call the police? Or should I move on?