We plan on doing an overseas trip when DS is approx 5 months. I have been warned against relying on car seats supplied by car rental companies and am not sure what to do. Our Safe N Sound Unity capsule was professionally installed and is anchored to our car so I don't think that bringing it is an option. My sister (who lives in the US) insists that the US car seat she had when her boys were little had the option of being anchored into a car without the base unit and if I recall correctly, she brought it with her when she visited me here and it did what she said - meaning she was able to install a stand alone car seat in our car while visiting us...is something similar sold here in Aus (meaning something that has the option of using it without the base so that it's easy to install in various cars while traveling)? What have others done?

Also - if you are willing to buy an airplane seat for your little baby, with the intent of using a car seat in the airplane seat will they let you do this? I just don't see how the bassinet is safe - wouldn't a big hit of turbulence would bounce the baby right out of the bassinet?