I've been there, and you definitely dont want to worry about gear while you're traveling. You might want to consider the Tamron 17-70mm f/2.8 Di III-A VC RXD since it handles kids and landscapes easily. Just be careful about the weight tho... it's a bit big. I would suggest checking used prices to save some extra cash for the trip itself. Itll definitely fix that autofocus hunting issue.

Like someone mentioned, getting a fast zoom is a total lifesaver for chasing kids around! If you want something super reliable that wont fail you in Iceland, you absolutely need to look at the Sigma 18-50mm f/2.8 DC DN Contemporary. It is amazing how much of a difference that constant f/2.8 aperture makes for your shutter speeds! Since the AF motors are modern, it tracks faces way better than the kit lens ever could. I love it because it's so tiny and light, basically the perfect travel companion for the a6700. Honestly, the build quality feels great and it's super sharp across the whole range. It fits your budget perfectly too! You’re gonna feel so much more confident once you see how fast this thing locks focus... no more blurry kid photos!

Building on the earlier suggestion, do you need extra reach for wildlife?

• Sony E 18-135mm f/3.5-5.6 OSS is super versatile.
• Its way cheaper than 900 bucks too.