This will be the first year, since I've been an iPhone user back in 2009, that I'm not pre-ordering and haven't felt the need to pre-order. *yawn*
There has been plenty of stock on store shelves for the past few years, when I've toured around the area on launch weekend.
That being said - I would pre-order if I were choosing a colored, standard iPhone 11, or a 64GB Pro (whether it was Max or not), or if I didn't have so many stores around me.
[I do live in a huge City with a lot of retail around, and I'm a mid-level Pro Max candidate.]
Good luck, as you go off to the races!