User blog comment:The Milkman/Citadel Review: Entertaining and Inconsequential/@comment-5362182-20130307141049/@comment-1440333-20130307192435

1) you can hold off the party until you have completed all missions if you want. Completeing missions unlocks characters for both the party and unique encounters on the Strip. 2) You cannot redo the party. 3) Unsure at the moment as I have yet to see anyone with those conditions play the DLC.