Your battery bank should give 960AH + or - 50AH, depending upon brand.
If boon docking, you should probably be able to go 1 to 1 1/2 days safely, before getting close to the 50% SOC level.
As the life of a battery bank depends upon the usage of Life Cycles, the less you discharge the bank, and then need to recharge it, will give you the best chance for a longer life on the batteries.
If you plan to do lots of boon docking, I suggest you install a good battery monitor. Bogart has a respected meter. I installed the Magnum BMK-Meter when we upgraded our inverter to the MS2812, and it does a good job.
SOC readings, are more reliable way to monitor your batteries then voltage readings. (Accurate readings, really should have the batteries disconnected, let sit for 20 mins, then take the voltage reading. Of course the readings you get while still connected are better then nothing, but not really all that accurate.).
I personally try to keep my overnight SOC levels in the 70-80% SOC range, and size our battery bank accordingly. Getting recharged daily up to at leas 95%, for say two days max, then spending the fuel to run the generator up to get it up to the final 100% every third day - will maximize your battery life.
As IASM said, we have some real sharp owners that know about battery management and usage, suspect they'll give you some more exact info
Best to you,