I bit the bullet so to speak and made the leap. An EBTULF portable, a bit price but nice reviews. I picked it over the Tushy because it was electric, rechargeable and I wasn't sure I would be able to squeeze enough liquid out of the Tushy to make it worth my while.
We've got a couple of trips coming up between now and the end of March, so it will get a good testing. Early reports are promising, just getting used to the operation.