You sound so totally prepared hun, i think you will be fine this time.
Will they let you take your own pump though? the hospy im delivering at has strict rules on this, they will only allow you to use their pump. So id check with them that they are ok with this, and that if they will allow you to use your own, that they arent going to take it off you to go and sterilise in their own steriliser right when you want to use it (which is what they do where im going with dummys)
But you sound completely prepared, your aware of the issues you could face, you have solutions to them and youre aware of the help available. Like others have said make sure to ask for help if you need it.
Goodluck