Don't forget step -1
Get yourself a few trusted anti-virus and anti-malware scanners and scan your PC.
You don't want some douchebag eavesdropping on you.
good point................
Also check out breadwallet if you have an iphone its a great and easy app for this sorta thing.
one other way i do it is
1.sign up to blockchain.info (you already have, very good)
2.go to import/export and enter all your paper wallets as watch only addresses. this means even if blockchain.info was hacked it wouldnt matter to you as they dont have the private key.
3.when you want to send BTC you can still do it from blockchain.info by just adding the private key, which they will ask you for when you want to send. however dont use that address again obviously.