Ronnie, thank you for caring for these cats and kittens.
You are keeping them alive. As for the kittens that hide, it is impossible to say how they will react to the other kittens. It's quite possible that they will get friendlier when they see that the older group trusts you. However, I can't assure you of that. It takes a lot of patience, and you were on the right track with the food.
The routine for socializing a feral is normally to keep them in a room which they cannot leave, and sit quietly, as you have done, but ideally, it should be done several times a day. (I know this is hard in your situation, but you will have a better chance of taming these babies if they are totally dependent on you.) You can't do weekends, I assume. That would be ideal. Normally, you would place the food far from yourself, dim the room, play some soft music, and just sit. Everything should be at the cat or kittens' pace. Never rush. Periodically, according to the kittens' actions, move the feeding dish a tiny bit closer to you.
When the kittens get a bit braver, treats and interactive toys, like da Bird, (something that can be played with a kitten who is at a bit of a distance, ) will help you to earn the kittens' trust. Be sure to do everything in response to the kittens' reactions; do not rush anything. Eventually, perhaps days, weeks, or longer, depending on the age of the kittens, they will gradually approach you. Do not pet the kitten until you are positive it wants to be touched. I know this sounds long and dragged out, but it has the best chance of working. Grown cats would take much longer than kittens, but the routine is the same...gradually and gently, allowing the cat to set the pace.
I so hope this can be accomplished! I would get in touch with alleycatallies.com for more hints and suggestions. It is also extremely important to get these cats and kittens spayed and neutered, and there are organizations who will help. Try some of those listed in your state at the top of this page, and call the Humane Society, (but don't give too much info. You don't want to have them put to sleep!) Just ask if there is a program for TNR closeby. That is, trap/neuter/return
There is a link at the top of this page, in fact many links that can help you in different ways, but this one is about low cost neutering by state. I wish you the very best. Please let us know how the project is progressing. We have some very knowledgable people here who will help you, and truly care. I wish you the very best!
Please keep us updated.
Cats have a way of worming their way into people's hearts. I'm so glad you're one of those people. God bless, and thanks!