Best Safari Lenses for A7s iii and A7C

Going on a safari for my honeymoon in October and I'm looking to take both videos and stills. I currently use an A7s iii for video some stills and the A7C for stills and occasionally video. I know that the S3 is a hybrid and can take really great photos, my only concern is creating larger prints to hang on our walls. Thus, I'm considering bringing my A7C as my dedicated stills camera, although my fiance wants to use her iphone instead of my camera lol.

So, I have a few questions:

1. Is it worth bringing the 7C for stills, even though my fiance will be using her iphone 15 pro max for taking her own photos or should I use the S3 for it's hybrid capabilities?
2. What lens(es) would you recommend using for video, stills, or hybrid (if not bringing the 7C)?
3. How important is an ND filter for early morning / early evening safari rides?