You'll probably have more issues with the hopefully automatic transition between WiFi routers.
What I've found we are sharing the internet with 2-5,000 other passengers. They all have discovered streaming is possible.
Unless your checking account is in the same bank as your credit card you will pay at least one day of interest. More if it's a weekend.
Use your ATM/debit card.
That's not likely to be a bank ATM in the hotel. The ATM is going to charge you a minimum of $3 and your bank $5. There is no conversion fee if you use an ATM card.
Don't ever use your credit card for a cash withdrawal. You'll start accruing interest >19% on day one.
ATMs are great but use your debit card.
And I agree, don't let them do the conversion.
RCI excursions always get priority; suites and Pinnacles generally get escorted to a separate tender area by the concierge. Only one passenger needs to get tender tickets for the entire group.