I thought it silly that my character could summon a bow out of the aether, but still has to carry around piles of arrows in order to use it. After searching for a mod to correct this, I found a few but all seemed to have certain issues, so I tried my hand at scripting one myself, and although I didn't really have a clue what I was doing, I seem to have stumbled upon a simple but effective solution.

When you equip any bound longbow, the script will check your inventory for a "Bound Arrow," and if it fails to find it, will add one to your inventory and equip it. The arrow is weightless and valueless, and will replenish itself when fired. I set the damage values very low for a little bit of balance, although the arrow damage is almost insignificant when using a Daedric bow anyways. You can still use regular arrows, but they will be unequipped when the bound arrow is first added to your inventory. The arrow will stay in your inventory even when you no longer have a bound bow, I think I could make it vanish with the bow with another script, but I thought it preferable this way so you can keep other arrows equipped when recasting/reequipping the spell if so desired.

Again, I have no experience or knowledge of modding, so please don't expect too much, it's possible this mod could have issues I'm unaware of. Feel free to improve upon it.