Your question leads with infosec concerns, but you may also want to think about customs or import regulations at your destination. You seem to already think it

Your question leads with infosec concerns, but you may also want to think about customs or import regulations at your destination. You seem to already think it appears excessive as a typical "personal use" travel package. Would a customs official think the same thing...? So, you might find better suggestions by looking to immigrant/expat community resources for the destination country. You might learn of particular paperwork or least-friction options to ship the majority of it and avoid surprise seizure or customs duties, etc. Also, some combination of encryption and online backups does sound like a good idea to me, unless of course the countries involved have nasty restrictions on encryption tools. Leaving a copy with a trusted friend or relative in your origin country can also give you a recovery plan. If all else fails, you can work with them to arrange an online transfer in the future, or just wait and get another copy the next time you visit your original country. You also might want to remove personal data from devices before shipping them, and plan a factory-reset/wipe procedure when you receive them on the other end if it gives you peace of mind.