Don't use airport exchange offices, use local Kantor offices (official money exchange offices). Use atms when in Poland for ready or walkin around cash; do not plan to use use traveler's checks, even Visa internatinal ones, as they are not universally accepted.
At atms, the money exchange/conversion will be done for you but with fees for w/d of money, too may not be in your favor.
See if your bank credit union has a share branch system with a branch or bank in Poland.
Or, use an online bank which charges low wire transfer and EFT fees and just manage everything online, including depositing and withdrawing of funds, transfers between accounts, bill payments, wire transfers, ACH and EFT transactions, etc.
Avoid ING Bank. A friend living in Poland says that's a terrible place to use.
We plan on using ATMs and wire transfers while we're living there, mostly. Cash occasionally, for buying small things, restaurant meals, etc.
Check into this bank called USAA in the US, as some people in Poland have reported it to be easy and low cost to manage and use while over there:
https://www.usaa.com/inet/ent_logon/Logon