I know you feel the urge to pre plan and all that, and you are certainly doing the right thing to work right up till the doors close. But whatever the unemployment system has in their wage records, whatever they have submitted for you on their quarterly reports as the wage you have been receiving during the base period, which is the first four of the last five completed quarters, will be what your claim will set up based on. And unless you have a paper trail (check stubs, etc.) of anything more than that or different from that, you won't be able to dispute your monetary determination and say you made more because of unreported tips. And in most cases, unless you just have some totally blank quarters all together, it is not worth it to go into that and argue for a different amount of payment than the state shows on the monetary determination, and this is why.
With paychecks being issued saying that you made about xxxxx amount of money per week, I suspect that's exactly what they've been reporting to the state, whatever they're giving you on your paystubs. And the good news is, you reach the max of $326 a week pretty quickly, and after you hit that amount of wages and earnings to get you to THAT point, it doesn't matter whether you made $30,000 or $130,000, you never qualify for more than $326 a week, for 26 weeks or less. So agonizing about whether they're going to count all your tips and wages exactly isn't very functional at this point. As long as you are showing enough wages to get you to $326 a week, (and they do not give pre estimates, you'll have to wait until you file the claim to determine this) that's all you could possibly get, whether they have what you believe to be the exact figures correct or not.
Expect a few weeks after you are let go from the restaurant closing when you will be getting your claim set up and you will not get any money. File for unemployment during the first Sunday through Saturday week that you are not WORKING, not the last week you get paid. The first week you qualify for will be a waiting week, no pay for that one, so it will take say, about four weeks to get your claim started and get unemployment checks coming in regularly. Plan for that. But you cannot serve the waiting week until you have signed up for benefits and began making weekly certifications, so do that promptly.