I guess I'm a dinosaur as I use a hand sickle.
Problem with salt hay is it lays down in "cowlick'' fashion, you need to stand it up to cut it, I'm talking the spartina patens, not the rush type salt grass, (alterniforna) sp.
with the sickle, you can comb and lift it up, grab it with your free hand, and cut at near ground level, easy.
You work your way in a semi circle around you,right to left for right handed guys,dump the hay slightly behind you on a piece of rope with a loop on one end, move up a step and repeat. when your bundle is heavy enough, put the tag end of the rope through the loop, pull tight, and tie off,You can cut more then you can carry in 20 minutes if you have thick hay.
If you think ahead enough, fertilize a patch of salt hay in the spring, the grass will be thick and long.