Thanks to all for the suggestions it has been very informative.
Bruce, the sticker shows the following:
GVWR 7400#
GAWRF 3600#
GAWRR 4200#
Combined weight of pass/cargo 1410# (I used the range since I will be upgrading to obtain a higher tow and cargo amount, but trying to stay short as to not overload.
So based off these numbers 1410-850 = 560- or right at the limits of the stock hitch but under with a higher hitch.
Would like to do a 5th wheel or a larger TT- but that would mean a different TV- and certainly not wanting to go with a pickup - interior space and all for 5 would be cramped to say the least.
Luckily we are still very early in the game- mostly online research- waiting for the next major RV show to look at many options at one time - so a new TV may still be in the cards...