You can absolutely get into the reds in a yak... Every honey hole of mine is accessible by yak... although some may have a slight paddle.
Check out Jaxkayakfishing.com, you will find tons of info.
Some good launches for yaks: Oak Harbor, Castaway Island, Dutton Island, or Guana. Guana has some really nice reds in it, and some monster trout and flounder.
Prostaff application pending