Looks like 5mm and hope, with a jug of warm water for the second dive.
I still am not sure of the general run of these things, some get there at 9 (Walter), dive around 9.15?, some daive around 10.15 (Fgray1) who get there later. With about a 90 minute dive, so around 11.45, tank change to 12 for second dive. When would you be doing the second dive? With my breathing rate and starting around 9, ending around 10.15, that would mean an SI of about 1.75 hours or so - possibly enough time to sneak off to church and get thru that to be back a little after 12 (~1 hour in Sarasota), maybe at worst 12.30, would the viz be rubbish by then?? Would you have already started the second dive by then. I am really not trying to play the religous card here, just wondering IF i can do what i would like to IF the SI is the normal time for others.