All sand is not the same... fine sand, coarse, packed, dry, wet... Nor is the terrain... flat, small gentle dunes, monster dunes... Straight line or whatever?? Paddle tires are different also... angeled paddles, straight paddles, 8 paddles or 10?? Many variables. What it really come down to is what works best for YOU and where and how YOU are riding. Best advice is to be prepared to air up or down till you get to how YOU want it.
Should be mostly fine sand. ITP sand star tires. Not sure how the dunes stack up to other places but it is at Silver Lake Sand Dunes in Michigan. Was kinda just looking for a base line. I think I have them around 6 PSI right now but wondered what others did