Hey houseboaters:
If I recall correctly the houseboats have no pillows or sheets. I highly recommend bringing a sleeping bag as it can get cold at night.
Also... last year the contents of a single box of rope I brought almost singlehandedly held all 12 boats together. Using the last dregs of the rope on some of the tieups was laborious and awkward.
If you've got some spare (reasonably strong) rope or locking/ratcheting tiedowns, you should bring them!
- Matt