Good job and a fun find. It looks like you found two harvestmen and they are arachnids, however, they are not spiders. The differences between harvestmen and spiders are that the body is a simple oval, and it’s usually hard to tell where the “head” ends and the segmented “abdomen” begins. They also lack silk and venom glands, and they only have two eyes whereas a spider will have six or eight. They lack silk glands so they never build webs and they lack venom so they are quite harmless. An interesting trait is that when something attacks them, they are able to release that leg to get away. It doesn't grow back and they go on about their way with the ones that they have left.