Help me prepare ! I go back to work in 3 weeks.

Give me your suggestions, tips, etc. how many bottles should I take to work each day ? Right now I block feed but I guess I will pump both sides at the same time once I start pumping most of the time ? Do I wash the parts between each session or just throw them in the fridge until next session and wash at home ?? Anything you think is helpful- please share !

I used my double electric for the first time last night. Going to use it nightly now to get used to it !