I've found solar to be impractical for touring. Eliminate all this:

6x mini carbiners (to mount solar panel)
7 watt solar panel
2x AA/AAA charger, each can charge 4 at a time via USB/solar power
12x rechargeable NiMH AA

and buy one (or two if you must) HyperJuice Mini (7 ounces, unit charges phone 5-6 times).

Extra chain is overkill. If your chain is somewhat old then replace with SRAM w/ powerlink, before leaving. Bring one extra Powerlink for unlikely emergency. Also replace cables if old and don't bother with extras.

6" adjustable wrench is heavy and unnecessary. Only bring one multi-tool.

For FLA Keys touring, sunscreen & water are your most important friends.