BTC/BCC fork - Blockchain or electrum wallet?

[Kagemand]

Hello,
I currently hold BTC on Blockchain.info. To my understanding this is not a true "online wallet" as I should be able to load the secret keys to my wallets in a program like Electrum.

Do I need to have a backup of my secret keys prior to this date, or can I still claim the BCC if I wait till, lets say 5th Aug?
Also, I have the impression it may be safer to use a "offline" wallet like Electrum. What is your opinion on this? I have never used this type of wallet, so I am paranoid I might lose it or somehow export the secret keys incorrectly. Of course I will be making extra backups and test these prior to transfering funds should I choose this route.

Last but not least - how are the BCC claimed after Aug 1th? As far as I understand, I will have to load my secret BTC keys in a wallet that supports BCC, hence leaving my BTC vulnerable unless I transfer these to a new wallet that is NOT on the BCC chain before trying to access my BCC?

I am sorry if this seems imcompetent but I cannot drag any conclusions from my Google searches. Hope you can help shed some light on this matter for me. Thank you in advance.

[lethos3]

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[OneChain]

Why are you not just using a hardware wallet? I think all of them should support BTC/BCH by now.