Wow, so sorry you had to experience that.
They sure did have to be there a long time to get all that stuff out of your MH AND the gen out. There had to be a couple of them to lift that gen and put it into a truck. :R
And X2. Check Craigslist and eBay 'daily' for your stolen items.
I've met a few RV'ers that have caught the robbers because the thieves immediately put the stuff up for sale on Craigs or Ebay. More often they use Craigslist because there are less restrictions/transparency to easily post it there rather than Ebay.
Not to add insult to injury but did you scribe in any identifying numbers/names on the items you lost?
What did the cops have to say when you made the report?