If you're enjoying the thought of wearing the suspender belt and stockings underneath when you go out, then I'd suggest that you go for it, as long as it doesn't distract you too much. You'll then have the luxury of being able to decide if/when to give your OH a sneaky peek as things develop. You may find that an ideal opportunity presents itself -- if so, then it'll be a fantastic surprise and a highly memorable moment for your OH.
Good luck, anyway, and have fun! :-)