I live on a lake, and I used sand when I first got poultry. Sand works OK, as long as you constantly clean and refresh it. I prefer dry deep bedding, but sand can work if you put in more effort in keeping it clean.
I suspect that when the temps get below freezing, you will find that the chicken poo mixed with sand will be as hard as concrete and you might not be able to scoop it out with your chicken coop kitty litter shovel device. Where I live, our winters are long. The chicken poo freezes solid and starts to pile up in the winter. In my case, I toss on another layer of fresh paper shreds about twice a month throughout the winter. It keeps everything looking fresh in the coop. Frozen poo does not seem to smell, at least when it's covered up with a fresh layer of litter.
By the end of the winter, come spring time, I have almost 12 inches of litter in the coop floor to clean out. But that works for me because my coop my designed to hold up to 12 inches of deep bedding litter.
I always advocate using free resources for litter. Those big box stores make enough money on me buying feed bags. I don't want to give them more money for litter.