Transferring AWS S3 Buckets

tl;dr - Install awscli (pip install awscli), then:

aws s3 sync s3://srv-salt .   --profile myFirstProfile
aws s3 mb srv-salt --profile mySecondProfile
aws s3 sync . s3://srv-salt --profile mySecondProfile

Install awscli
A quick Google search sent me to this StackOverflow answer, which made awscli news to me. I went with installing via Pip so:

apt-get install python-pip
pip install awscli

Configure awscli
I have a few profiles to manage, so, following the docs, I configured each of them with:

aws configure --profile myFirstProfile
aws configure --profile mySecondProfile

Transfer the Buckets
Once I tested out each profile with a describe-instances, copying an entire bucket to another region was simple:

aws s3 sync s3://srv-salt .   --profile myFirstProfile
aws s3 mb srv-salt --profile mySecondProfile
aws s3 sync . s3://srv-salt --profile mySecondProfile

And that was it! I love it when things are easy...