Mel, I did that slant parking business with all my other trailers , This one , the water just races off the round roof .. no matter how it’s parked ...
Since the FS entry door is in the back , I do park it nose high (a little ) just in case... more precautionary than necessary ... No problems at all ... After every large rain (daily) I check inside the FS ... still dry as toast ... no worries !!! We did make this one to survive living Outside (too big to fit in the garage, or the shed) with a bare minimum of maintenance ... and so far it’s working out well..