Number of guests

How do I change the number of guests for different nights of the same party?
Ex. They are staying 3 persons 3 nights but will be totally 6 persons the first 2 nights

You cant, the only way is to make mulitple reservations with the correlating number of people for each night.

I would just send a special offer for the total price (be sure to add the cleaning fee) of he entire stay, assuming you’re charging extra person fees. Then I would document in writing the number of guests you’ve agreed to on which nights.