What are the duties and orders i have to fulfill? How long would my "work day" be during the siege? And what could I do to pass the time and have fun? where there games and contests that took place inside the camp or even brothels to ease the tension among the men?
https://www.reddit.com/r/AskHistorians/comments/4m6x3j/what_did_medieval_soldiers_do_during_sieges/
/u/eeeeeep wrote a great reply to the same question a few days ago
Follow up - We often don't hear what it was like for the defenders during seiges. What would they do, day to day, both soldier and civilian?
I'd like to add a cautionary note, if that's alright.
I hope that I may be proved wrong, but I would advise you not to hope for too much specificity in your answer. As /u/eeeeeep did, we can speak in generalities about the high medieval fighting man's experience, but the sort of primary sources that would tell us what their lives were like, what they thought about them, etc, simply do not exist. Chroniclers were exclusively aristocrats or clergymen (or both), and their work focused overwhelmingly on the social elite and their acts. They include a great deal of information on the broad strokes of campaigning - where the armies went, what they besieged, how long these sieges lasted, various comments on deprivations and other general conditions - but less than could be hoped for on the micro level. They weren't awfully interested in the nuts and bolts of tactics, organization, logistics, and all the other things that medieval military historians would sell their eye teeth to know.