Yeah-- I'd think a skip-skip is easiest in K-3. On the other hand, given what a last-resort it is, and given that administrators are often viewing a skip that way as well, in some respects, the best way to approach a skip is to compact rather than to 'skip.'
That is, have a child do 2y in a single school year by being placed in a split classroom in the younger grade, and at the end of that year, move with the older cohort.
Minimizes academic gaps, minimizes social displacement, and is much more 'natural' feeling to both child and peers.
