This can vary, I'd say most of my couples book around a year in advance. However, in some cases it is 6 months before or with elopements much much shorter. I never want to rush anyone into booking. It never hurts to reach out and get pricing and then we can always pick up the convo on your timeline.
Usually for engagements and portrait sessions you're looking at 2 weeks and for weddings you are looking at 5-6 weeks. Sometimes film can take longer to get developed and into the gallery but always try and keep you in the loop.