When I used xikar trays, I normally just put them pore side up and filled them. I let them soak about 20 minutes and then shake off the excess and wipe them down. I now only use Boveda packs.
I think it depends on the person. If you can taste the flavors easily enough I say have at it. I smoked mostly milder sticks in the beginning (and still do) but I bought quality cigars.