Come on!! Nobody will do anything like. When I moved from Canada last month, Immigration did not even bother to ask me anything about luggages. You will be okay. Make sure you bring lots of summer clothings, favorite swimming costume for kids. BTW, what company you are joining? Congratulations. Welcome to Doha.

One more small opinion, if you have preference with certain kind of meals (e.g. Vegetarian, kosher, Halal), please make sure you do that by yourself. If you ask your HR representative, most likely he/she will forget right away. From Toronto to London, I was starving. :)