I have been going out to sand mountain for years but have not yet made it out there with my Talon so take this suggestion with a grain of sand so to speak!........
Before you spend a bunch of money on sand tires, I would suggest going to sand mountain for the day on stock tires. You should be able to navigate the dunes without paddles unless you want to climb the big dune...... then you will probably need paddles.
I used to navigate almost all of the dunes (except the big dune) in an FL350 Honda Odyssey without paddle tires.
Here is a link to a video.... at just past 1 minute, you can see me in an FL350 bone stock on standard knobby tires heading into the dunes.