Self-bailing packrafts incorporate holes in the floor of the raft that allows for water to pass through the boat once it enters the cockpit. These boats won’t have a whitewater deck, and will use a seat to keep paddlers up and out of the water as much as possible.
A self-bailer will be better for warmer water paddling, however, you’ll likely still want a drysuit, since the chance of getting wet is high.