Well good thing I'm here
By all means continue the trip...hopefully slide in solves the issue for now until someone can take a look at it. Sounds very peculiar that you can cover the window and still get water through that window. Obviously leads me to believe it is something above the slide...but then it would have to be getting in under the slide topper. What slide topper is shorter than we would like, but thats the compromise with the main awning so close.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).