Cash Management while traveling is certainly a personal preference.
For us, we typically start out with 2500.00 and it is "distributed" so its not all in 1 location in case of compromise. DW and I each personal carry couple of hundred, the remaining is stashed in truck, trailer, car, motorcycle . Stashes used to replenish our personal carry as required. When cash stash gets below 1000 its time to hit an ATM to stoke the coffers, just do a google search for ATM near me and figure it in the travels
The withdraw amount can be limited by the specific ATM, the least we were able to get was $400 at a 7-11 but a majority of ATM locations will allow 1000 and some bank locations 2000 per transaction. We get reimbursed for all out of network ATM fees by our bank and there is no additional fee from our bank.
We have multiple accounts, checking, savings, brokerage etc. and they are all linked to be able to transfer between them on line, auto overdraft, auto payments, etc. We manage the balances, transfers, cash flow, credit cards, ACH debits and credits online through our secured internet connection. We never use any public WIFI, our devices are connected to our password protected network or cell providers towers only. Works for us.
YMMV