And in the States your credit dings will roll off your score after 6 to 8 years (bankruptcies stay on there for 10). So if you're going to be gone a long time and then go back, it might not be an issue. Check also for the statute of limitiations for collecting debts in your state of origin.
(Student loans will never leave you, so if you ever expect to collect social security, pay on them. The govmt. will attach your SS payments for the debt, when the time comes. And any IRS refunds. If you're a US citizen, you get to pay US taxes no matter where you are.)