How do you best handle the required timeshare presentations for vacation deals?

My boyfriend and I just signed up for a discount vacation package that requires you to attend a “90-minute” tour / presentation about a timeshare. I know these presentation things suck, and that they really, really push the hard sell, but the vacation is something I’ve been specifically wanting to do without wanting to spend the kind of money it would typically require. So this seemed worth it.

I have attended one of these things before, but I was about 5 years old at the time, and I went with my parents. They hated it and found it to be the most irritating thing ever, to the point that they said it wasn’t worth the vacation, haha. They stayed strong and did NOT purchase the timeshare, despite the guy criticizing them by saying that they must not want to spend enough time vacationing as a family if they do not want this deal.

Anyway, I am positive at this moment in time that my boyfriend and I do not want to buy the timeshare they are going to try to sell to us, but we are required to keep an “open mind” throughout the tour / presentation.

I am specifically hoping for answers from people who have experienced these timeshare presentations and NOT purchased the timeshare. How do you remain polite enough that you seem like you have an open mind, but still stay firm enough about not being interested? Since the contract only requires us to attend the 90-minute presentation, if they keep us longer to try to convince us, are we permitted to leave?

Please offer your best advice in handling this situation with grace and strength!