Planning

My husband and I are trying to plan another baby. I’m well aware that I can’t plan for a specific due date, but I would like to plan for a specific time of year for lots of personal reasons. I’ve been calculating due dates using my LMP and also possible dates of conception. Is one more accurate than the other? Obviously my LMP is a bit more exact, but they’re giving me very different due dates so I’m trying to pick which to aim for. If I go by my LMP I want to try and conceive on my ovulation date immediately following that period, correct??? I’ve done this before but for some reason I feel like I’m so confused this time!!! haha