250's on the sand?

I'm wondering about riding the sand dunes with a 250 4-stroke... Someone told my to use a 6-cup paddle (not an 8-cup) if I'm going to ride my 250 out there, but I already have an 8-cup. Does anybody have any experience with the dunes on a smaller bike? Should I buy a 6-cup, or am I cool with the 8?

I'm about 190 pounds, and yes, I already know a bigger bike would be ideal for the sand, but I'm usually on hard pack. I have a crf250x that's been jetted, piped, and all the slow parts have been taken off. Plus, I'll probably buy a Hot Cam before I go.

Thanks. I'm gonna see how it runs on the sand, but the strain on the motor will probably always be in the back of my mind. I don't think I'll actually ride it much as I'm gonna bring my girlfriend's 350 Warrior, and since one of my good friends is renting a dune buggy, he'll probably let me ride his yzf400.