You may want to try IRV2 website. As this has a very broad band of trailers and motorhome users on this site. They even have sections for specific brands of trailer/motor homes.
They went out of business around 2010. RV mechanics will tell you they were well built and nothing compares nowadays. Website has downloadable manuals, schematics for all models. Membership is 1-5 years, different prices.There is a Carriage owners club- https://www.carriage-lifestyle-owners-club.com