The "escape" crash is quite common, and I find it happens a lot less if I quicksave (Ctrl-S) before doing an escape-save... Loaded quick saves crashing sounds like it could be a corrupted file - often happens if you load/reload/refight battles a lot in a single year, maybe cos the camp map and battle results get out of sync somehow.

Are you running any mods, or pushing your machine's specs too hard?