I would suggest that the size/type of hitch has less to do with 'how much' you can tow as the actual RV Chassis has - it's GVCWR limit is the final say... though I'm sure many are towing more than they are 'allowed', whether due to misunderstanding, lack of knowledge, or even if they know they are.
The Chassis manufacturer designs the chassis for a certain weight limit. The size/type of hitch they, or the RV factory, attaches, can not override this limit, no matter what the hitch limit itself is rated for.
Weigh your coach, with everything you are going to be traveling with: fuel, water, people, stuff, food, etc.
Subtract that from the GVCWR of the chassis, giving you how much 'weight' you can then tow, safely, within the Chassis limits.
If the hitch falls within those limits, then you are good. Attaching another hitch does not change the safety limits of the chassis.
have fun! : )
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the Turners...
two Campers, two Electric cars
former diesel pusher traveler
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