^^^ THIS. It's almost impossible these days to walk up and be able to get in to sit no matter what you're sitting for. Unless it's really odd times like maybe 3pm. We've sat outside of the front desk while waiting for ADRS and the steady stream of people walking up expecting to get in is constant, all the way to close.
We go every trip as a walk up for ice cream, but we are always willing to sit at the bar. Usually, we have little or no wait, but we have waited up to 30min. (max. we'll wait).
If you want a table/booth, you will need ressies. We have no desire to eat there - typical burger type place, nothing special, or different from most of the CS.
We made reservations there last time we went for about 130, and it did seem very busy. The kitchen sink ice cream for the group of 6 was lots of fun though, totally work making an ADR for if you haven’t done it before