if you want store something for long-term (years), securely and offline, go with bunch of paper wallets generated and distribute them to multiple locations.

Trezor is more or less for somebody, who is actively using bitcoin and needs another (hardware) layer of security..I'm just too conservative to use some "small USB gadget" for more than 100USD, if I can use paper + for Trezor backup you need to store paper with recovery seed anyway...