These will solve your problems 100%.
It’s just a very thin (1mm) heating element that goes under your toes and maintains circulation. The flat ribbon cable isn’t noticeable once you start riding, and clips to your bootie no problem.
Back when I used to do 3 hour rides in any weather, it turned cold feet into a total non issue. It was never in your mind for a second to think about your feet. Amazon has them, as do most good ski shops. Pricey, but a complete problem solver.