-- Last Updated: Feb-06-13 10:00 PM EST --
There's really not much point in saying "besides bulkheads." If your kayak does not have bulkheads and you go over, your kayak will fill with water and even if you right it, it will be virtually impossible to bail out and get started again, assuming you can get back into it at all. This sort of kayak should only be used in calm water, preferably within swimming distance of shore. Large lakes can easily get too rough for an inexperienced rec kayaker.
The exception is if your kayak carries two large inflatable flotation bags, which very few rec kayaks will be equipped with. You may (with practice) be able to right it and bail. But even then, a rec kayak really has no place in rough water. As mentioned above, the additional stability they offer on flat water actually works against you in high waves. The hull is more likely to be flipped over than a narrower sea kayak which, with a little practice, is much easier to keep upright.