Make sure you bring fiat and not just Bitcoins. That's been tried once before: http://www.geekwire.com/2011/bitcoin-befuddles-customs-agents-thwarting-seattle-visit-digital-currency-guru/
I would send Bitcoins to people in the other countries to pay them to prepare whatever I need before I get there
so did the fellow in that article, and he was still turned back..
Don't worry, I'll have everything worked out
I'm planning on getting border guards to WANT me to cross into their country