I'd be more concerned about the police trying to take a bribe than being arrested or fined while in a foreign country. With a little research you can see if that is common where you are going. I've had it happen to me in Mexico and Romania (not for camping) and heard stories of the same in many many other places but I wouldn't be all that worried about it if you stay smart

From my experiences the local people are always extremely friendly and so excited that somebody has taken interest in their town/country. I know people who have camped in Romania on bike tours and had people come out in the morning giving them small bottles of local liquor and fruit to take with them etc. That sort of hospitality is common around the world