[DonRotolo]

To emphasize what David Brinza wrote: Magnets can be put inside a magnetically-shielded* box to reduce external fields.

*Magnetic shielding is accomplished by using any material that conducts magnetism. Steel, iron,nickel can be used. Mu Metal is a special alloy that is hyper-conductive to magnetism. It's a bit costly and hard to find - you might get some from around the picture tube of an old CRT monitor or TV - but a small steel box, surrounded by a larger steel box, all put inside your checked bag, should have a negligible field at 7 feet (don't assume - check it. Your pilot depends on his instruments, and if your magnet is messing with that, it could be your life at stake).

Minibots can be checked. Just disconnect everything from everything as much as possible, and pack the batteries separately. I'd hesitate to bring them as carry on.