Passport and visa issues - some countries do require one or two blank passport pages on arrival; others require the passport to be valid for up to six months after last day of legal entry with a visa (this could be a total of a year after entry in some cases).

Some countries add visa pages - others - many - do not add pages and one is required to acquire a new passport.

Before you go use TIMATIC to check your trip. I use oneworld's version because the fonts are more legible. Link.

FlyerTalk, by the nature of its purpose, is a good place to get suggestions and input - but not such a good place to find actual, reliable visa and passport information on occasion. TIMATIC is an IATA program used by the airlines (when they deny or approve your travel plans at the check-in counter).