RE: Can I make 1100mi & back in 9 days
Not with kids that young unless you drive at night. Basically you'll have to sacrifice a few of your vacation days to drive at night and sleep during the day.
RE: Trading in TT for a Fiver....We like this one?
Google search of the model says it's only 8100lbs dry. You should be fine with a 3/4 ton depending on how much stuff you load the trailer and truck with.