My in-laws own at a Blue Green resort (Big Cedar). They used to do the tours every year to get a GC, but they stopped because they kept getting more and more pushy and would openly lie to them about many things. From what I've heard, if they tell you it is only 90 minutes, set an alarm on your phone and when it goes off tell them you are done.
There are also techniques on avoiding the hard sale, the easiest to remember and follow is just say no on everything. No and only No. Don't give any reason, when they ask just say "Just not interested," etc. If you give any type of reason, they can play off of that to try to convince you why that isn't a big deal.
FYI: Bass Pro just sued and settled with BlueGreen over their pushy sales tactics at their stores and with people they signed up for tours at their stores.