You won't need fans unless you are going a long while without opening the humi.
I have an Oasis and beads in my cabinet but it's a big one, about 6 foot tall. The Oasis is a pain in the ass to be honest, I have to refill it all the time. I've had it unplugged for like 6 months but I'll probably get it going again for the winter.
I'd say just go for beads. If for some reason they don't cut it then go with active. But I think just beads will be fine.
It is easy, by the way. They are just cigars. Don't over think it.
