I use a cat carrier; The one I got at petsmart has a metal mesh top so Porter can see out of it and it gives him space for several toys and other things.
I prefer a harder, shorter cage simply because in the long run it is easier to use, and clean.
As a travel 'cage' for out time I have a soft sided fold down dog 'play pen'.
Porter loves his carrier so much he sleeps in it, but as for the front door where the bars are too widely spaced I wrapped and wove bird safe fabric through it and turned the whole section into a toy for him as well.
I have two perches in there and a variety of toys at any given time.
[ame="http://www.amazon.com/Best-Pet-Folding-Play-Pen/dp/B002ABO2HE/ref=sr_1_4?ie=UTF8&qid=1380752138&sr=8-4&keywords=Collapsible+play+pen"]Amazon.com: Best Pet Folding Play Pen - Blue - Medium: Pet Supplies[/ame]
I wouldn't use it while I wasn't there but.. when travelling its no hassle right? Another idea is this cage...
I use it as Porter's usual cage but he's a little bit smaller than a GCC; and he HATES large cages; its 18x18x30 L (1/2" bar spacing) and it folds down to a size that would fit in any suitcase. Easy to put together..easy enough to clean and it even has handles on the side for easy transport. I'd break it down though and transport your bird in something a little more sturdy :3
[ame="http://www.amazon.com/Petco-Designer-White-Finch-Flight/dp/B004I2KCF4/ref=sr_1_1?ie=UTF8&qid=1380752200&sr=8-1&keywords=Finch+flight+cage"]Amazon.com: Petco Designer White Finch Flight Cage: Pet Supplies[/ame]
What it basicially boils down too is I have a smaller carrier for overnight trips and for longer trips I either just bring his cage with me, or use the fold out pen. Tabletop perches and other things work really well inside of it; despite not being able to place perches like one ordinarily would. He stays in his carrier when I'm on vacation or out with me on his harness. (I use a feather tether because it is the only kind he'll readily accept.) Otherwise when its tv time or quiet time on vacation he's in the playpen on a table or the floor happily playing away.