I use ring shanked nails, galv or zinc coated, and hot dipped in adhesive. They will not ride up, I guarantee.
The only draw back, if you have to remove one board lets say to access a water line or water timer, you will have to destroy the board, because the nails will not come up with the standard prying methods, they will go through the intended board.
If I am asked to screw down decking boards, I will charge much more in labor, because of the extra labor in setting and installing screws. Its takes much longer than my portable nail gun.
Just make sure they are galv or zinc coated and ring shanked.