Of course, happy to help and love to chat.
Another good question. I think at the med student level if you're considering surgical oncology you should really seek out research opportunities in a basic science lab. It does *NOT* have to be a cancer lab. Can be an animal lab, bug lab, gene lab... whatever. The idea is to understand the type and scope of work and way of thinking and what a day in their lives looks like, and also hopefully get some publications on their CV. My own experience was pre-med and 1/2nd years of MS where I worked in a lab doing muscle mechanics/kinetics research. It had no medical application what-so-ever, was pure biomechanics, but the tools (fluorescent microscopy, animal dissection and specimens, enzyme harvesting, etc.) gave me a really good idea of what that world was all about.
Why is that important - because people in oncology, particularly surgeons, are INCREDIBLY active in the immunotherapy and tumor microenvironment arena. A TON of research is done on that, by surgeons, who are running basic science labs studying those very things. Or looking at tumor markers. Or looking at tumor targets for drugs. You get the idea. To answer your next question - are most surgical oncologists doing this?
Now. Take this with a grain of salt - my experience is from surgical oncologists who I met while interviewing mostly who are program director type people and I'd say about half to 2/3 of them had basic science labs. But the average surgical oncologist is a 75/25 clinical/research allocation for their work time. If you have a basic science lab and are a true surgeon scientist that can be closer to 50/50. If you're 75/25 or higher on the clinical side you are probably doing translational or clinical research studies.
Last question - specialists (ENT-onc, uro-onc, ortho-onc) work WAY more hours, get paid WAY more money (x2), and generally wish that they could just do cancer operations but can't. The problem is that many of these specialties require help with call coverage so they're in multi-specialty practices within their own discipline (like, 10 orthopods but only one is ortho onc). This means they're also in the ER call pool. For urology this means they're still doing LOTS of cystoscopes, foleys, stents. For ENT they're still doing LOTS of video DLs in the office and trachs. All of our non gen-surg type specialists who are cancer fellowship trained or cancer practice oriented all have those call burdens and "regular" duties inherent to their specialty. Surgical oncology definitely CAN have that same obligation with general surgery, but I would say that's actually becoming more rare. Lots of surg oncs don't take general surgery call, and there is not really such a thing as a surgical oncology emergency - those are called general surgery emergencies. Also, those non-gen surg sub-specialists usually have a smaller scope of cancer operations. Like our uro onc team is 5 people, but one does all the prostates, two do all the kidneys, one does all the bladders, one does the weird penis stuff (yikes). Our ENT guy essentially does the same like 4 operations - face/parotid dissection, laryngectomy, neck dissection, weird mouth resections. Sure, there's 10,000 variations inside of those things, but you can boil it down to that. Ortho onc does pathologic fractures from cancer, extremity sarcomas and bone cancers which are exceedingly rare tumors. Surg onc has way way more realms that we're trained in and capable of doing. Does that mean we all do? No. But there are definitely still true general surgical oncologists who operate head to toe and are fascicle in 40-50 very distinct operations. Also the money discrepancy usually has nothing to do with their cancer practice and is because of call, scope, cystos, normal joint replacements, whatever. The cancer piece is usually a passion and not the primary driver of income. Our urologists make WAY more on their cysto days where they churn out 20 cystoscopes in a single day than 3 nephrectomies. Same with the ENT guy - every time he does an office cancer surveillance visit he has to do a video direct laryngoscopy which takes like maybe five minutes but its a billed procedure every visit, for nearly every patient.