I would just get a standard under-seat pouch for everything except the pistol. Having it in the pack is just a bad idea, IMO. I carry too, but on my person where I can control it and have access to it if needed. What are you going to do when you have to park the bike for a few minutes to use the facilities? I don't know what FL's laws are but in WA leaving it unsecured would be illegal.
AFAIK, if the gun is even seen at all in FL you've got problems, so how do you get it in and out of the bag?