Secret Keeper

Say if you were Albus Dumbledore and you've just had a meeting with James and Lily telling them that their infant son and entire family have been marked for death, how would you have dealt with the whole secret keeper business with them?

Say if you were in Dumbledore's position, and you've just had a meeting with James and Lily telling them that their infant son and entire family have been marked for death, how would you have dealt with the whole secret keeper business with them?

Here are some shocking facts about the Potters deaths:

1. Multiple people were responsible for it: Voldemort for obviously doing the job, Peter for betraying the Potters by giving away their location to Voldemort, and Snape for telling Voldemort the prophecy which caused him to go after and kill the Potters.

2. It all could have been easily avoided: if Snape had never told Voldemort about the prophecy in the first place, if the Potters had accept Dumbledore's request to be their secret keeper, if Sirius (who was the initial secret keeper) hadn't convinced the Potters to switch their secret keeper to Peter, if the Potters had not agreed with Sirius's idea to make Peter their secret keeper,or if Peter hadn't given up the Potters location.

3. Most shockingly of all, still bitter over his past treatment of Snape, the fans took it out on one man (James Potter).

Tell me what you think of all this!

I was re-reading DH earlier and I realized that Arthur Weasley was the Secret-Keeper of the Burrow, and Bill was likewise for Shell Cottage.

So my question is, why couldn't James or Lily be their own Secret-Keeper when they went into hiding from Voldy? Wouldn't it be so much more foolproof?

Were they just too trusting of their friends or am I missing something?

I was reading the Sorcerer's stone and it just crossed my mind that Harry and Hermione and all other people were able to see the Potters' hiding spot. The strange thing is that the house was protected by the Fidellius Charm and can only be seen by the people to whome the secret keeper has revealed its location; in this case, Wormtail. He was alive when Harry and Hermione visited Godric's Hollow and they both saw the house in ruins.

I don't think the charm was broken because the same charm was cast at the House of Blacks and it was not broken when Sirius died.

Does anyone has any explanation to this or is it just a plot hole?