Not going to be much if any difference in how the RV Stuff works......
Pretty much same 120V AC system 12V DC system, appliances etc
Do you have any background with any trailers?
If so shouldn't be difficult to figure out.
AS for specific info...wasn't any then as in diagrams/schematics
All the stuff was very generic as is the case now.
What are your concerns.....problems.....how do you need help.
Ask specific questions (with Brand/Model) and you will get LOTS of info.
Some of it even correct :B
Like your description..1974 Vega 5th wheel
Vega Corp in Indiana made RVs 1968-1980
5th wheels........they made 14 different models in 1974.
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31