Thinking to how I would deal with the situation personally I would think that physical survival would be fairly easy as long conditions weren't extreme.

The tough part would be mental survival. I'm anything but afraid of confined spaces but staying in said place for 3 days could really test your brain. Being able to occupy yourself.

In October I visited Alcatraz and took the audio tour (voiced by the guards and inmates who lived and worked there). One of the stories which stuck in my mind was related to the solitary confinement...where the prisoner would be in a very small cell for 23 hours a day...much of that in complete darkness.
Some of the things they came up with to occupy their time and save their sanity was truly amazing...I think it would take that sort of ingenuity (though maybe at not quite that extreme) to get through several days in one spot with enemies and danger all around you.

Then again it might be as simple as a deck of cards or some dice.