I have taken all the advise on board and here's my plan...
Create 10x Bitcoin address's on an offline computer using downloaded version of bitaddress.org. Create 10x Bitcoin address's with Electrum on offline computer. Put all 20x keys in KeePass using encryption and 30 character password. Then encrypt KeePass file with TrueCrypt and different 30 character password. Copy to file to several USB sticks, and bury the USB sticks in waterproof boxes in family members gardens.
Can then pay a little into each wallets for the next 20 years and there's a pension plan

sounds good to me, but might i suggest to use VeraCrypt instead of TrueCrypt. TrueCrypt had some problems and development has stopped. VeraCrypt is the successor.
oh and make sure to include a version of the used software on the usb as well. maybe a newer software will not support you old data anymore (which i consider unlikely) and you will have a hard time finding an older version.