After looking at the links for he specs on the 2 trailers I would skip the first one. The CCC is to small for a bunk house which will have a family and their stuff in it. I pack a lot of stuff for a week long trip, I'm 2k more than the dry weight. No family will ever only pack 500lbs of stuff. Even 2 people are going to be near 1k lbs of stuff!
The second trailer has a more realistic CCC of 3k lbs. i'de go with the second one.
Also the dry tongue weight is meaningless. You want the loaded tongue weight to be around 12.5% of the trailers loaded ready to travel weight.