Hi Fairy
I took my 3 children and fled to a women's refuge last year. They are fantastic.
Some women turn up with just the clothes they are standing in, others manage (like me) to bring more stuff, but it was only mine and the kids' clothes and their favourite toys - the older 2 had their nintendo DS etc.
Bring, as Norks says, as much paperwork as you can, and obviously if you have any money that's great but if not they will help you out with benefits as soon as you get there, emergency loans etc.
It's really nothing to be scared of...the refuge I was in was really good, it was divided into self contained flats so we had our own kitchen, shower room and bedroom/living room/dining room. Some refuges are more communal, where you have your own room but share kitchens/bathrooms.
Each woman had their daily jobs to do ona rota...things like sweeping floors, mopping, dusting etc, but it literally took ten mins and then the time is yours. They will arrange for the kids (if applicable) to go to a local school, will help you register with local drs, they will arrange counselling if you want it...they really do bend over backwards and despite there being a lot of tragic stories in refuges, there is a lot of laughter too.
I hope you're ok and find the strength you need.