I definitely agree with that. If its raining, but still reasonable warm, its better to just use your ordinary shoes (or a pair that you only use for these situations. They tend to be quite soggy...).
I use my Gore-Tex runners when it's snow, that on the other hand works great. My usual shoes...
We stayed three nights (think it was the minimum then) at Weingut Ebert in one of their Ferienhauser. Its 10+ years ago, but last time I Googled it it looked the same. Its in Wintrich, 10-15k from Bernkastel. In the middle of a wineyard, a couple of minutes walk to the river.