After a lot of research I purchased an Acme "EEZ Tow" dolly from cartowdolly.com. Due to Covid and other issues I haven't had a chance to use it yet but I can say that I'm extremely happy with it's fully galvanized construction, etc.
My reasons for choosing it in addition to its construction were:
1. Its positive online reviews and comments in the various RV forums.
2. I like the idea of it's hydraulic surge disc brakes with their independence from electricity.
3. Its relatively light weight (380#), both for my sake and to minimize my overall tow weight.
4. The fact that it will tip up vertically for storage.
5. Its price.
Here are some Winnieowners threads re: the Acme Tow dolly:
https://www.google.com/search?q=%22A...client=gws-wiz