Simple Life,
They will just fly away if you aren't careful. The minimum you should do to prevent that, is release them late, so that they have all night to settle, and can check out their surroundings, once it gets light.
I also make sure there's moisture around for them to drink from, until the begin to eat.
Some people cool them off to around 40 degrees to calm them. (It's a common practice to hold them in the ice box.)
It's also a common practice, recommended by some of the companies which ship them, to spray them in their container with either some sugar water, or a mixture of soda and water, before releasing them. What I don't like about modern sodas are the chemicals in them, and corn syrup. Maybe it's okay, but if I were going to do it, I'd choose the plain sugar water.
They do the above in order to prevent them from flying, giving them more of a chance to find food in the garden they were put in, thus staying once it wears off. That happens in a few days.
I don't know about anyone else, but I like bugs in general, and ladybugs in particular. I enjoy seeing them.
