There is a glitch, wich allows you, to equip items, when in werwolf form. It was alredy in the vanilla game, but the power "Secret Servant" allows to execute it, without a follower.

1. Cast Secret Servant.
2. Inmedialty after step one, go in the menu, and equip Beast Form.
3. Aktivate Beast Form, as quick as possible. While you are transforming, the Dremora butler, will engage dialogue with you.
4. When fully transformed, tell him to carry some items.
5. Scroll to your side of the menu. Equip whatever you want (literaly, there is no limit for equiped items in WW form), but keep in mind, that armor slows you down, even in WW form.

The best thing about the glitch, for those who didn't already knew: You can enchant i.e. two rings with +20 Stamina, and give them exactly the same name. Now equip one of them in WW form. You will either equip the ring you clicked on, or the other ring with the same name. In both cases you just have to click on the othe unequiped ring, wich will strangely not succeed. But every time, you try it, the effect is
applied to your active effects! They stack, and will even remain in human form, until you unequip the ring. And since, you have no slot limit, you can do this with multiple ring pairs at once.