We've been out of town up to 6 weeks on RV trips or long cruises. As mentioned, I usually pay my bills in advance where possible. All my finances are through a single vendor - checking, savings, investments, credit cards, and on line bill pay. Also as mentioned before, you can either call the numbers on the credit cards you have or go to a website and check balances and usually pay online. If I don't think it'll be convenient for something like the electric bill, I simply look at my history and stick a payment for about 150% of the expected bill out there at the normal due date. The excess just goes to a credit balance and gets applied to the next bill. The one thing I personally will NOT do is set up an automatic debit account. With a debit account, the billing company controls the payment, not you. To get the account debiting stopped, you have to get the other party to notify the bank, not you the account holder. As Mitt Romney says, I want to be able to fire the people who I pay to work for me.
Jerry