When I was only dumping $60 a week, it was easy to dump at one bank. Now I still have one dump/source bank and is becoming a little more difficult. I have a bunch of source banks, but I am now finding myself needing dump banks that can accept bagged coinage.
Those kind of dump banks are a little harder to find. As your volume goes up this can become a real challenge. I spread my action out so they don't cut me off. Look for other branches of your main dump bank. I get my free bags from my main dump bank and give them quite a bit of action, but I also take the filled bags to other branches of the same bank for deposit. If one branch of a bank will accept bags for deposit odds are that other branches of the same bank will do the same.
I also have a slight equipment advantage.. My 2 Glory automatic rolling machines can chunk out a goodly number of rolls so that I can also dump conveniently at some of my other banks that require the coins to be rolled for deposit.
If your percentages are low.. just sort more. If your percentages are high.. just sort more.
Now selling Copper pennies. 1.6x plus shipping. Limited amounts available.
I dump at two of the 4 branches they have and also get free bags from them. Now, I usually dump around $100-$250 at each branch a week. I REALLY don't want to start hand-rolling coins again, nor do I want to spend $1000+ on getting a rolling machine.