I have a 1997 Dutchman Aristocrat Travel Trailer.
I have searched for a manual to find wiring diagrams and facts about tank capacities.
I appreciate any help as I am changing the converter and adding an Inverter.
Unfortunately, things like wiring diagrams don't seem to exist. The best bet on tanks sizes will be to try and find a brochure for your model, that will get you in the ballpark. Thor bought Dutchmen in 1991 then it was handed off to Keystone around 2015 (Keystone is also owned by Thor) every handover leads to lost documentation.