STORING TM IN AN OPEN, UPRIGHT POSITION?

We have stored our TrailManor open for almost two years.  When I asked the factory about it they said it would be fine. The trailer does get rather dirty (we do not have a barn to put it in) but we love being able to get into it.  The kids even used it for a club house on a rainy day.  We also are able to easily keep the battery charged.

That's my 2 cents!