Because "Summer Days....and Summer Nights" & "Pet Sounds" contained instrumental tracks, many fans have assumed that "Smile" would have also contained instrumentals, yet on the 2004 re-recording of "Smile", Brian(or his collaborators) decided to have vocals on all tracks, even a wordless vocal on "Fire". Obviously some 1966/67 "Smile" tracks are instrumental because they were unfinished, but it is likely that "Fire" & "Holidays" were originally intended to be instrumental. Today, with Brian being so famous for vocal harmony music, do you think the decision to have vocals on all tracks of the 2004 "Smile" was out of concern that younger fans either wouldn't accept a purely instrumental song from Brian, or that those younger fans would view instrumentals as "filler"?
This is only my opinion, but I think that "Holidays" sounds better as an instrumental, Smile's equivalent of "Let's Go Away For a While" or "Pet Sounds" or "Summer Means New Love".
...but for the fact that the
melody on BWPS fits so perfectly I'm not sure it was going to be instrumental in 66...