? about booking a package


I booked a package for DS and his wife the other day. I had only gotten a one day ticket figuring they could pay for the tickets once they got there. Now with the talk of tickets prices going up…If I put 8 day tickets on the reservation and the tickets price goes up, does the package price go up? Reading the fine print, I believe it says the price can change unless it’s paid off in full. Am I reading it right? So it won’t do me any good to add the tickets unless I pay it in full, right?