Your 2009 23' should have a decent black water holding tank capacity. We (2 adults) can "go" (excuse the pun) for about a week with our black water tank ('06 19' Bambi) and I think your tank is probably larger. We rarely camp anywhere longer than a week, so this works for us.
If you really need to dump your black tank more frequently, a blue boy is a viable solution, but as Brian said, you need to be careful or you might find yourself in a mess (literally). If you go that route, get one with sturdy wheels that won't break, can be "towed" slowly with your tow vehicle if necessary, and not so large that you can't manage or lift the weight when full.
Although it's a hassle, I would personally consider taking the trailer to a dump station, especially if there's one in the park not too far away, and we could do what we call a "minor batoning down"...enough to get us there and back without everything falling out of the shelves...
We thought about getting a blue boy early on so that we would be prepared for the possibility, but frankly we have never had the need for it.
TB & Greg and Abbey Schnauzer
AirForums #21900 . Membership Chair, 4CUnit #3954
Travel Log: AZBambi...On the Road Again