We keep our Corgis' water bowl recessed partway under the storage compartment under the lobster sink next to the door. The back part of the bowl is supported by a face towel folded in half and the front part of the bowl is on the bath towel that we keep by the door.
When traveling, my flip-flops also go in this space, otherwise, they are outside by the steps.
More information about this space is seen in my post, "Fired up, and ready to go
", on my "History Safari Express
" blog, on the Airstream Life Online Community