Air conditioner for my 11 foot truck camper?

Our windows are crank-out jalousies with attached interior screens so using a window is out of the question: we do not want to remove the whole window unit for a retro. The issue of draining the moisture from the A/C won't work with the window. Perhaps a bucket with a cover that has been cut for a hole to fit the drain hose. This works for us to drain gray water out to an enclosed bucket when necessary. We also have a portable dehumidifier but it is ineffective.