There are only a couple Clif Bloks with caffeine, the rest don't have it.

My favorite is the Cran-Razz blok, but I used to like the Cran-Razz shot ('cept I'd get all sticky no matter how neatly I tried to eat it!)

Clif Nectar bars and Lara Bars are nice long-lasting energy, and don't have oats or caffeine.

I was under the impression that on ALC you have access to pretty good food. Is there a reason you won't be able to eat what is provided?