Actually Cat 12 will only sleep 3. Cat 11 has the pull down bed and will sleep that forth person. If you book a Cat 12 with 4 ppl you will be upgraded to 11 automatically.
off topic, but for what it's worth, I changed my Cat 11 (4 people) to a cat 10 in order to get the split bath...for the 3 day Wonder, the difference was only $20!!!!
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