yeah bases arent necessary, just makes it easier as u only have to install the base once and dont have to keep on reinstalling the seat. its mostly for convenience...but why r u asking, dont all infant car seats come with bases in the US and Canada? Unfortunately, u have to buy them separate here, thrn it makes buying a car seat as if u were buying a car!
They are not necessary. The base is in my car and when family or hubby takes the baby they don't use the base. I took my carseat to the fire dept. and they installed it. Nothing makes a carseat tighter than a 300lb firefighter with his knee in the base pulling the straps.