Do you have luggage scales? That way, you can confidently pack right up to the weight limit. 
Yup. We each get one free hold baggage at 50lbs weight. We can each buy an additional hold bag/box up to 50lbs at $75 each. I kept the spacebags we used coming over, and a good number of them are going back with us.
We are both going over with empty suitcases (except for stuff we're taking to friends) and coming back with them packed, and one box each. (Rather than extra suitcases.) The Daughter is bringing back some clothes and crafts stuff she left behind, and my guess is that it'll take her suitcase and box, and probably half of my box. Which is ok, as I am not going to bring nearly as much - although I'm getting shoes, jeans, a good sweatsuit, and a lot of little stuff....
