Hi David.
I do pretty much the same thing with my bank account and a PayPal card. In fact, since I trust my best friend Marshall, I can even leave him a card when I am not on the island. I do the same when I transfer just slightly more than I need to withdraw and then, after withdrawing that amount, immediately transfer a replacement amount that takes about 5-7 business days to complete the transfer. That way it leaves about the same amount on the card almost all the time.
See you later this year.
Peace and Guidance