I am going to get a Dominion expansion (probably intrigue based on its popularity) but in the meantime I'm curious about what I can do with just the basic set. I know it was designed for 2-4, but I don't see any real solid reason why it can't go to at least 5. I'm perfectly fine with adding any sort of house rules.
The game ends when the provinces or gone or 3 stock piles are exhausted. I figure you could counteract running out of kingdom card piles by possibly adding a few more kingdom cards. To combat the number of provinces we could just add some regular playing cards at the bottom, since they won't go through shuffling too much. My games are pretty relaxed and fun oriented, so some little hacks like that would be fine if they let more people join in.
Does anyone with experience with playing Dominion with 5+ players, with or without expansions? Any other strategies to making it possible for an extra player or two to join in? How will the game change with more people and is there anything I should keep in mind to make things run smoothly?