I searched for your model and found this:
Motorhome Magazine Open Roads Forum: Calling all Road Warrior owners - RWS, RWT, RWM
As in most owner's manuals, their opinion was that it's pretty useless. It'll probably advise how to wash seat belts, but doesn't give details about how your RV was put together. You might look on various websites for owner's manuals of similar RVs, they are pretty generic but can give someone new to the RV world some tips.
Winnebago Industries Operator Manuals
They're free and lots of information.
In addition, as you go through your unit list make and model of every appliance and system you encounter. Then time spent on Google will yield owner's manuals for almost every system in your RV. I keep a file of these documents in my laptop for quick reference. You will often get troubleshooting guidelines and parts lists too.