Surgery.... with 2nd thoughts to Gas? How-to?

Hello,
I'm a MSIV planning on surgery right now, but I am entertaining other thoughts.

As of right now, I will not be able to do an anesthesia rotation until October. My goal is to apply to surgery and enter a surgical residency. But, I have a deep intuition I will love anesthesia when I rotate in October.
I think I will apply to both fields just to be safe. If I don't like anesthesia in October I won't rank programs/decline interviews, etc.

So what would be my best course of action? Take a surgical Cat vs. Prelim position and apply to anesthesia positions my PGY-1 year? Would it be better (for me personally) to "take" a Cat surg spot even though I may switch out of it?
Or apply to anesthesia this year? Categorical? Advanced positions with a surgical intern position?

Step 1 226, Step 2 226. Good school. Good grades and letters.
My biggest problem is that I would not have an anesthesia LOR until Nov 1-ish. Yikes. Would any program even entertain the idea of interviewing me?

And yes, I did search and read similar posts on the forum. Thanks for the help! I'm not asking for help on delineating between these two career choices. That I can do on my own. I'm just a late comer to the anesthesia game and am curious on the nuts and bolts of applications. Thanks!