Trin - I hope that the girls managed to get to school okay.
You do know it's okay if not though, don't you? It's okay for them (all or one, or two) not to be ready to face the questions they may be asked about what happened to the man that they love and also face their friends care, love and support yet.
It's overwhelming for them. Going back to 'normality' except it's not normality is it, because Cliff's not here. So, very sorry darling. xx
The school will have told the girl's classmates, or maybe in an assembly (as you know 
) what has happened and maybe not to ask the girls about it just yet. They may well want to talk about Cliff, they may well need to talk about the gentle giant who loved you all so much. :)
Children care, children see the hurt in others, they can feel it. They can see it hidden behind tired eyes, the desperate attempts to hold it together from the girls can make others just want to help, hold them, give them a big squidge. Girls more so...........
Even if they have to come home early today, they are trying, you are all trying to move forward, one day at a time. They will also pick up on you being upset today so might be a bit tetchy later..... don't blame yourself or them.
Today is going to be so very hard for you all but well done for making it happen, well done for trying to restore some small amount of normality, as painful as it is for you all.....
WRT to the funeral, you don't have to decide now whether or not you're going to speak and I agree with Lemony. You could always write something and ask someone else to read it on your behalf? Or not. It's up to YOU. Maybe the girls would want to draw him a picture? Or write something themselves? Their favourite day with him? They don't have to read it out, it could just be part of them saying goodbye for now.
Do what feels right for you. You'll know, it will come to you darling lady. I'm just so sorry that you are having to do this at all.
You'll know what to do, you'll know when the time comes how to plan the day, who to invite etc. Take your time. You have enough to do before that and we're ALL here to support you.
Every. Step. Of. The. Way. xxxx
Now then, have you found that giant sanctuary of yours yet? :) xx