There should be other ways to obtain the Field notes.

[TalithaSolarien]

I personally know players with a high amount of Ex Primals kills and no mount (I'm talking about 200+). And yes, totems can be exchange at a later date, however you have to wait months. Probably at some point SE will add a coin exchange for field notes.

I wouldn't bet on it, they didn't add an exchange system for the Eurekan mounts either.