Since I (apparently) [can't fly from SAL to Choluteca](https://travel.stackexchange.com/questions/121330/flights-info-for-choluteca), I was planning to drive.  But then I had to think some more: Will I be required at the Honduran border or at the rental counter to show an international driving permit (IDP) or pay an extra fee for leaving the country with it?  Or buy/show insurance beyond [what I normally get from Allianz](https://www.allianztravelinsurance.com/find-a-plan/rental-car-damage-protector.htm)?