Either way works, but modifying your existing reservation is easier.
Thanks for the advice, I'll jump in and try modifying.
Originally Posted by htb
I don't know how you can use a BOGO for "both of these nights". The BOGO is for the second night, and it should cover the same service as the paid night, even though some hotels may try to charge you for breakfast.
HTB.
Yes, I had a mistype there.

I am using the BOGO for just the Sun night with an AP rate for Sat night. What I was trying to say is that I should keep my room type booked the same for both nights but only add the breakfast included part to the rate, correct? ie, don't book cheapest room available AP and then book a huge suite 2nd night, hoping to get it on BOGO.