I’m not sure I understand your question, but by Steamers do you mean steam tables? If so they will kick on and off but will draw far more on initial start up than at any other point in your work day.  If you concerned about surges in your usage start one item and wait 10 or 15 minutes before you turn on your next big power using item. I wouldn’t think a generator being capable of producing more power than you need could ever be a problem. It’s the other way around that kills a generator.