I'm not sure the Daimyo's Guards get out all that much. Even former allies like Tani and Konoha are also probably hesitant about allowing others into their lands. Afterall, just two decades ago, the villages really<em>were</em>hidden. Part of the reason Iwagakure didn't steamroll over Konoha in the war was because<em>they couldn't find it.</em><br/><br/>The Guards primarily have two jobs;<br/>Protect the Daimyo and the village.<br/>Watch over the Tani villagers themselves for any threats from within.<br/><br/>Having a foreigner inside the village would be a very big deal. I think I mentioned Tashi had a mission where some other village's delegate was in town and they had all twenty Guards pulling long hours to make sure everything went swimmingly. That could just be the Daimyo being a paranoid bastard, but this is a long ways away from the Chunin Exams of the manga, where other nations are invited for the explicit purpose of building trust and averting war.<br/><br/>Even Tani and Konoha as allies are very very very begrudgingly so. Tanigakure essentially took advantage of the normally all-powerful Konoha's moment of weakness to levy upon them a debt.