I agree with the heavier is better than lighter within reason. Since a TD is so light to begin with, even moving an ice chest or extra prolane tank or cast iron pots to the inside, or keeping the water tank or portable water container full or empty for that matter while traveling if the tongue weight is too low could make a world of difference.
It mike make sense to install unobtrusive folding tiedowns inside while building, the situation where something needs to be tied down while travelling.
Again some common sense here comes into play. Again, just my opinion.