You got some great advice and options to explore. Just be sure to let the drivers know what it is you are doing and be predictable.
My order of preference is:
1. Use the turning lane as you first outlined
2. Use the crosswalk if the wait for an opening to is too long
Some days you can do option 1 with no issues and others my may have to use option 2. Be flexible and predictable.
I personally would wait in the bike lane until traffic clears up, usually in a minute or two as traffic flows in spurts (from what I've noticed). When clear, swing over to the left turning lane and proceed as usual.