Caching map before going remote for a few weeks

Hey guys,
Im headed into northern mongolia for a few weeks and cant seem to find anything on the documentation specific to this. I will be without wifi for about 3 weeks straight and need the ability to plan some flights on site. It looks as if i can do it before hand and sync my ipad but im wondering is there a way to grab a huge map tile before hand so im not planning blindly in the field?

Thanks!

Sounds like an exciting trip! Other than pre-planning flights, there isn’t a way to do this at the moment, unfortunately. Apologies for the inconvenience.