USA live poker trip

I am a UK citizen wanting to go to the US for 3 months to exclusively grind live poker. I have a UK bank account (Lloyds). How can I get a bankroll to the US? I know that anything over 10k you need to declare and there's a possibility of them seizing your money anyway, whether in the US or at the border. What is a safe way of 1) getting a bankroll over there (would I be able to just withdraw daily from my UK bank account in the US?) and 2) bringing my BR and potential winnings back to the UK.