Living in England, all of my bass fishing involves a plane ride. Since 9/11 it has become increasingly difficult to take rods on planes, and especially so if you're crossing the Atlantic. I used to fly with one piece rods up to 8ft long, but that would be either all but impossible or extremely expensive nowadays. I have built up an arsenal of decent quality 2 piece rods for my bassing trips, and they work well, though I hate the compromise I've actually managed to get most bases covered reasonably well in 2 piece rods, but it isn't easy.
I haven't fished in Portugal, though friends have. The fishing can be very good. I believe it's a bit of a procedure getting fishing licenses, so you might want to look into that. I've fished in Spain a number of times and believe it's similar to a lot of Portuguese bass fishing with deep clear mountain water supply reservoirs. Rock and not much weed due to the water level fluctuations. A lot of the bait is small 3-6" silver fish, called "bleak" and not as much crayfish as is typical Stateside. As a result I would probably expect spoons, cranks, jerkbaits, flukes etc to be one line of attack, but senkos and neds will catch you plenty too. I had a very good Spanish trip where Baby Brush Hogs were the best bait. As always, it depends on what the bass are doing and where they are.
There's a pretty decent competitive bass scene in Portugal, so do some googling and you will be able to find out about some of the results and venues.