Well, you should not fight in the city, but this not means you have to keep peacefull, if you not like Orcs then let them know, make comments, insult, scream for the Cityguard, eun in cycles in panic, whatever, RP it
And yes, behind the gate there each and every camp should have a 'fightzone' this is used when the NPC army gets the camp, they have to hold this zone for some time and the camp is considered taken by them.
The fight Area is where the big fights Camp vs. Bad Guys should happen - or better not let them even come into the camps
And for assassination, well, idk if you got thou the rules, each try to assassinate someone needs a GM informed and taking care of the action - and you need the suiting talent on your character sheet. BUT: All private Tents are (surprise) private. So not enter them and try to kill the Victim in sleep.
But a kidnapping is possible, i just think of getting the victim between the tents, sneak behind them and use the Talent "Knock unconscious" - and then try to get the KO Body out of the Camp and in your caring hands
Also you could try to poison, but a fight between all the tents, fires and lines criss-cross the place... nothing what really is fun
And the dungeon, yep, it is different ^^ in the dungeon itself there is fighting, where the residents of it have there tens behind/aside/somewhere arounfd the construction of foils and wood that is the dungeon itself. So it is a dangerous place what makes it so fun, eh? Also it has a nice Tavern inside itself, the Mad Goblin - this is worth a visit.
So yes, the conclusion is right: the meadows between the camps are the main fighting zones. And who keeps peace there? hmm, we are at a siege to get into the fort of the undeath, right into a warzone... A Dangerous palce, no guards there on the meadows, sometimes oyu just have to run... or make people run from you.
Some actions like this tend to have consequences too, as some orcs on the meadows took down some Firecampers, what made the firecapers 'friendly knock' the door of the orccamp...
And the thing with the IC Coins. I not know the rules to this, so i let this unanswered before i tell rubbish - although i mostly it is just asked: "do you have coins with you?"
Greetings
brauni