We did three things that made our travel life stress free as far as mail/bills/payments go.
1-We got a box at the UPS store and changed our address to that, permanently and for everything. They hold our mail for however long we may be gone, no 30-day limit, and will send it to us if we request them to. Of course this means we have a yearly box fee, and we have to pay the postage whenever they send us our mail (but that doesn't happen very often). We tell them when we are leaving town and how long we will be gone, even if it is only for a week. Our particular staff is very friendly and we have never had a problem.
2-We had our credit card bills switched to paperless billing so that we get emails when our statements are ready. We print the statement, then schedule the payment online from our bank. For our house utilities (electric, water, gas, cable) we set up automatic payments so those bills are always paid too through the respective company.
3-Our gas and electric companys offer what they call budget billing so you pay the same amount every month, whether you are home or not. For the months when we are gone we are overpaying but also the months we are home we are underpaying. We are in Arizona, so during the summer when running the a/c we may only be paying $80/month when our actual usage is $150; then in the winter we are still paying $80 when our usage may be $30. It all works out, once a year they adjust our payment to be closer to actual usage; they don't want you to get way ahead, or way behind.
Having as much as possible done automatically or online has worked very well for us for the last five+ years. It may (or may not) be something you could find helpful.