should be 10-15%total weight of trailer
being said that.
GVWR= 6,900 lbs
10% = 690 #
12%= 828 #
15%= 1,035#
They say somewhere around those numbers.
Now the 21 footers would be less for TW as you go by total weight of loaded unit.
Depends on what they pack
But with the bigger trailer, stick with GVWR as total as they weight in empty around 5,900# only leaving 1,000 lbs to spare, which adds up FAST
NOW to answer your ?
no that is about right weight