If you're direct latching your LO, you can pump out the excess after each feed to freeze. I pump in the morning at 6am, then feed my girl (or if she wakes up first then I'll feed her then pump). Then pump at 1 plus (sometimes 11+ if there's a meeting at 1+, 2) then another 1 around 4+, 5. Then go home will be latching my girl whenever she want then pump again before I go to bed at ard 12. So far, I haven't touched my frozen stash yet. At work, I'm very blessed my previous company has a very nice nursing room and fridge for us to store ebm. My current place doesn't have a nursing room but there's a nice room where we can go pump. So you can also go see if there's any nursing room, or meeting room where you can use. I don't sterilize my pump parts at work. I keep them in a air tight container and keep in the fridge. Only wash and sterilize when I get back. Some ppl also use hot water, and some use sterilizing pills. I use a fridge to go which has been an excellent help in transporting my milk and stuffs. A normal cooler bag with ice pack does the trick too unless you're traveling very long distance.
Lim Xue Ping