We do support two type of payment methods as Online payment (17 supported payment methods). Please refer here: http://guide.travelerwp.com/docs/other-feature/payment-methods/#post-1094
and Offline payment (called Submit Form).
We had update some change in our new version that Submit form will change to Bank transfer. We add more field in this payment method that allow user to leave their bank account in there so that their customer can be able to see and make bank transfer.