You've got people coming, you've got a Friday-to-Sunday on the calendar, and you've got roughly $1,500 to make it feel like a real weekend without a real hangover on your bank statement. The trick with hosting is that almost everything is a deadline purchase: the further out you book, the more you save, and the less you end up putting on the card.
Most of the spend is front-loaded — lodging, travel, and a stocked kitchen — and then it trails off into meals, activities, and the small stuff that adds up. So the goal is to lock in the big-ticket items early, leave a buffer for the weekend itself, and spread what you charge so you clear it well before any intro window closes.
The 0% intro period on the Citi Simplicity® is a deadline, not free money — it runs 18 months from account opening, and any balance left after that point starts accruing interest at the card's standard rate, which can be steep. The move is to pay it off in full before the window closes. If $1,500 over 18 months feels comfortable at $83.33 a month, great; if life happens and the balance is still there at month 17, prioritize clearing it rather than rolling the rest into interest.