IIRC, you can look at models of BWV on the boardwalk, AKV and BLT at the sales center at SSR and maybe a BLT model at BLT.
if you want to go to OKW or VWL for a meal at olivia's or artist point or something like that, sure. check out the lobby. if pool hopping is not blocked out, that can be an option - try the clown slide at BWV...
but there's no official
DVC tour for sold-out resorts.
if you want to look at a room at BCV or OKW, you can go to the resort and ask the lobby personnel if they can show you an empty room if they have time. but if the lobby CMs are busy checking people in, they would not have time to show you a room.