Unless you were driving the vehicle enough for the oils to get hot and the exhaust to burn off liquid, you weren't helping anything and potentially hurting it.
Same with the generator, unless you got it to operating temperature and put it under load for a specified amount of time, you aren't helping it at all.
I'm not sure if Seafoam is a fuel preservative or not, but if you fill the tanks put something in that will preserve the fuel. Stabil fuel or Startron are my preferred options. I've been using Startron in my small engines for about 10 years now with no issues over the winter. If keeps the ethanol from separating and the fuel from going to garbage. I drain the carbs so the fuel doesn't gum up over the winte rtoo.