Real-world overheating limits for camera in tropical heat

Hi everyone,

I'm currently putting together my setup for an upcoming travel documentary in Colombia and could really use some real-world advice regarding camera gear and thermal performance.

I'm currently deciding between the Sony ZV-E10, ZV-E10 II, or stepping up to the A6700 all paired with a Tamron 17-70mm f/2.8. My main anxiety is overheating in Colombia’s hot and humid climate.

I’d love to hear your actual field experience before making a purchase!

My typical shooting style:

• B-roll & run-and-gun: Mostly run-and-gun footage with short clips (10 to 60 seconds).

• Interviews: Occasional sit-down or street interviews lasting around 10–20 minutes maximum.

• Format: Shooting in 4K (S-Log3 / 8/10-bit).

My questions:

1. Do you think I should purchase a camera with active cooling, because the other camera's definitely won't be able to stand the heat?

2. Do you think the Sony ZV-E10 (cheapest option) would already be working well for my application or is it really advised to upgrade to a better model in order to shoot real cinematic content?

3. Also I have read online that because the Sony ZV-10 can only shoot S-Log3 / 8-bit, sometimes banding can occur during color correction. Is this like a real common problem?

4. If you see any other big gaps in my choice of equipment, please let me know.

Thanks in advance for the help!