Good question.

With the amount of good seeds you already have that will be enough to satisfy your personal needs but if you want to do a gorilla grow for distribution you could go the bag seed route, keep in mind you will only get mid grade price for it.

I am going to do a few gorilla grows this season by investing in some outdoor strains and using cloans.

As for getting seeds from your current plants you need to do selective pollination at around week 3 of flowering. First you need a pollinating male, take a paper bag and cover a branch or cola of a male and shake. Then go to a female lower branch that is starting to flower fully cover with bag and shake again, mark that branch for easy indentification at harvest. Only these buds will have seeds not the entire plant by doing this.