If you are traveling by plane, be aware that they sometimes don't like you bringing magnetic cubes with you on the plane. I have been stopped once, but once they realized that they were just cubes they let me keep them and there was no real problem. I don't usually bring an actual timer, just my phone. I like to bring big cubes and enough for doing relays, but I would never bring my most expensive cubes.
I think that you could take your Aosu and Huanglong, because there is little chance that they would get lost, and cubes are for using not leaving at home. If you really like them, then you can replace them if you happen to lose them.