Yes. A bag or the original box it came in. Practice safety.
If you are at the field you do not need a gun bag or box but if you go to any store or other field where you have to carry your stuff into the area you need to have the guns in bags boxes wrapped in a blanket or something like that. Our field is a little different because you drive onto our property so not needed but I would recommend one just to protect your stuff.
According to CA law, yes.
You do not have to have one no
No you do not at least not that I know of
Thanks! Your answer is awaiting moderation.