I suppose that's to be expected from the North Koreans, but it's rather funny, since the ship is actually very lightly armed. Wikipedia says it only has 2 M2 Brownings aboard, does the North Korean museum claim it was armed with more, or do they claim that's heavily armed?
I think they emphasized the weaponry because the US billed it as the capture of an environmental research ship in international waters, while the DPRK preferred to position it as a thwarted military incursion into sovereign Korean waters.
I imagine the DPRK classifies all Americans and Europeans as simply "Western imperialist dogs", or something like that. The last thing I'd be worried about when planning a trip to Pyongyang is whether the US is cool with it. I would go to nearly any other country than go to North Korea. Just doesn't seem worth it. Wouldn't feel right putting my tourist $$$ directly in the pocket of the fascist Kim regime, for that.
I went in 2012; all the villages I saw exhibited poverty, failing and non-existent infrastructure, evidence of food scarcity and some interesting evidence of long-term solid fuel shortages. That said, we didn't specifically visit them. Drove by and through