Picture the porch at dusk, twenty cousins talking at once, and nobody worrying about who fronted the money for the cabins. When you are planning a family reunion nine months out, the trick is knowing what needs locking in today and what can wait until spring.
Group spots book fast, and you usually have to put down real cash to hold them. Breaking the total cost down into steady chunks keeps you from scrambling when the arrival date finally rolls around.
That 0% intro window is a deadline, not free money. If you still have a balance left when the 15 months are up, the standard interest rate will apply to what is left over, so make sure you plan to clear it before time runs out.