You can be held responsible for the deficiency between what you owe and what the lender recovers from the sale of the RV.
If the lender sues and is allowed to take a judgment against you, it can attempt to collect. However, all Social Security benefits and most private pensions are exempt from creditor judgments. SS, SSi, SSD are all completely exempt from any garnishment or seizure. Your pension depends on the type and what your state statutes allow for exemptions. More than likely, your pension will be completely exempt.
Lawyer (JD)
Litigation Attorney practicing in multiple State and Federal Courts, Arbitrations and Mediations