You're statying in one of the most beautiful places in our area. Blue Mountain beach is a short 15-20 minutes drive to Destin.

Check out this map (pdf):
Map of Highway 30-A, Beaches of South Walton

I'm sure you'll love Blue Mountain.

There will still be attractions and fun stuff, but it will be limited hours/days in October.

Not sure if you're referring to a Pirate Cruise in Destin... but, the one in Panama City Beach (30 minute drive) runs in October... here's the schedule: Pirate Cruise Calendar

Enjoy your stay!
October is a very relaxing and beautiful time along the Emerald Coast!