please bear in mind that at this stage in the game we are in the backwaters of faerun... I'm sure once baldurs gate eventually gets made yes there will be what you ask for as they are large communities with crime, not a druid grove in the middle of nowhere where everyone's preoccupied with a ritual....
Other than that, if you stuff up a pickpocket in the goblin camp on either of the traders you're in for some trouble, even if you succeed they come looking for you.... there's no reason for what you're requesting at this stage in the game, you just need to think about things a bit more.