https://amzn.to/43ZcCz1
All the things that are easier to say "Hey go buy this" than it is to carry on the website. These are Amazon affiliate links. We make monies when you buy from these links:
This is the best handsaw to ruck with: Lightweight, ergonomic, replaceable full-tang blades. There are some folding saws that seem like that they'd be a better bet but you usually don't get more blade than the Zubat and the pistol grip handle offers more power than straight handles that want to slip off.
https://amzn.to/43ZcCz1
Silky Zubat Handsaw