I think I'll maybe just do what Danny suggested above.
Create new paper wallets every 5-6 years & transfer balances.
Easy enough.
Plus let's be honest we should know in 10 years if bitcoin is going to be a huge success any way.
So I'll be either selling most of mine at a very high price or keeping paper wallets that are worth nothing.
I guess you are doing the same as me. Either have lots of purchasing power with all your btc in the years to come.......or............have a load of worthless numbers in a wallet.
I am in this for the long haul.