Thanks for the responses. Your replies did give me some ideas and are appreciated.
I did a bit more research and I think I'll go with the Blue Sea Solenoid/Battery Dual Circuit System. It's seems to be a simple system. The switch with the unit has an 'off, on, combine' that is simpler that most dual switches with the '1,2,both, off' switches.
The kit also includes an SI* Automatic Charging Relay that, as the Blue Sea site states "automatically combines batteries during charging, isolates batteries when discharging and when starting engines. It also allows temporary isolation of house loads from engine circuit during engine cranking to protect sensitive electronics". What I was looking for was a system that would isolate the starting battery from the house battery that will power my electronics, bait well and bilge pumps but will charge both batteries when underway. Seems like what I need but anymore input is welcome and again, thanks for your information and ideas.