If you have a tough time saying "no" to salespeople or you just don't like the smarminess that goes along with commission sales techniques, I doubt that whatever incentive you are going to be given for attending is going to seem worth it. Luckily, I have a secret weapon to counter such techniques: my wife. She's beautiful, sweet, and good-natured -- but do not cross her. Our parents gave us a trip to Jamaica for our honeymoon back in the day -- we were counting pennies a lot more carefully back in those days, and a timeshare salesman offered us a free breakfast at a resort in Negril if we would listen to his pitch. We listened as we ate, and politely said no, and then he started with the "rough stuff", acting as if we owed him something and attempting to corner us with a procession of "managers" and "finance reps" who were nothing more than thug arm-twisters with poor hygiene. It wasn't long before my wife stood up and let loose a blast of indignance that singed their nose-hairs.

God I love that woman. We were out of there with no problem, and a full stomach.
A few years ago we were again enticed to sit through a timeshare presentation in Orlando, but we built in an excuse by taking our two-year old. We figured no salesperson would voluntarily submit himself to our daughter's antics for more than an hour and a half.

The irony is, we happened to hit it off with our salesperson, a very funny, self-depracating Argentinian named Italo with a great technique -- he was so good we weren't even aware that the 90 minutes were up, and yes, before we left we actually signed a contract, and since then we've been proud and happy owners at Marriott's Grande Vista. Sure, we probably overpaid a bit in comparison with a re-sale, but we got exactly what we wanted for what we thought was a fair price from a man who deserved every penny of his commission.
In my opinion, the timeshare pitch is what
you make of it. Let them intimidate you, and you'll be miserable during the experience. Take the upper hand, and they'll be glad to give you your incentive and be rid of you.