Ah, okay. That has never happened to me but I did prepare it. You can adjust the water level in the return compartment to wherever you want it, so it doesn't matter how tall the baffles are.
You'll have to test it by filling the tank to where you want it and then breaking the overflow siphon and see if the pump overfills your tank and get it to where it doesn't overflow. Mark the water level line on the sump and that is your max fill line in the return compartment.
There will be a balance though because the splashing into the return compartment will make microbubbles.
You can buy pumps to keep your siphon always going, and i've never really heard of it failing. So if you want to skip worrying about that I think you would be okay. It is good to be cautious though.
You'll have to make your baffles really high for an hob
filter to work wouldn't you?