If you can find a metalworker that can weld a sleeve over the creased areas it would go a long way toward giving you adequate safety. If you have cracks get those attended to immediately. Even welding a length of steel rod in parallel with the damaged tubes would take the load. Patch it up until you can replace the frame. This is exactly why steel is best for long trips. I'll be you are within a few mile of an auto/bicycle/motorcycle repair shop that could weld in some reinforcing.