Planning help!

I would be wary about weather there at that time. I was at Grand Canyon the last week of November last year and we were actually really lucky because we went 2 days after a big snowstorm that had closed the roads and the park and we were able to go the day it reopened.
It can be very cold and snowy that time of year, so while it’s beautiful, roads will close and it’s harder to plan since the weather is unpredictable. You can check out the national park websites for each park, they normally have a section about road conditions and should have them per season so you can see what’s open and what’s not.

That sounds like an amazing trip!

However, like pp said... the weather at that time of year is very unpredictable. If you don't mind the cold, and know how to handle the rough weather, then it sounds like the ideal honeymoon for you.

I've never been but the Grand Canyon is definitely on my bucket list!!

Here's a quick honeymoon guide you can check out with suggested activities: Grand Canyon Honeymoons, and a few previous forum posts worth reading:

Grand Canyon for Honeymoon?

Grand Canyon / National Park honeymoon