What if the transporter shits itself right after beaming you down? What if a Borg cube shows up and your ship has to fuck off at maximum warp? Now you're stuck there with no supplies. Good job.
"The ship had to bail out while an awayteam was planetside and the awayteam now has to survive under harsh conditions with some survival gear" sounds like a great opportunity for an ENT episode tbh.
Putting together gear for survival in general is very tricky: You need tools and materials to make a shelter, you need something to keep yourself warm and dry, you need drinkable water, food and possibly weapons. And all of this needs to be suitable for the environment that you are in and still be light and small enough that you can carry it.
This can be rather hard to achieve when all you need to do is dealing with different climate zones on earth, now imagine how hard it would be to put together some sort of survival kit that needs to be useful on an entirely unknown planet.
It would be interesting to see a bunch of ENT characters get stranded on some planet that does have a fauna and flora, but everything is so strange and alien, that the characters don't know how to deal with it. Maybe their waterfiltration system is not capable of dealing with whatever is going on on that planet, maybe some of their gear is perfectly fine to use for a certain task anywhere on Earth, but it fails horrendeously on that planet, for some reason.
It could be an interesting learning experience for the crew, where they realize that whoever picked their survival gear put together something based on what militaries on Earth use, but it doesn't take into account other planets.
That's the kind of stuff that I would like from a TOS prequel: People slowly figuring out how to travel the stars, learning about new threats, dealing with new situations and slowly knocking together all the bits and pieces they learn into what will later become standard in TOS.
And on a sidenote, something I always liked about SG1 was how in many episodes, when main characters went to some unknown planet, you'd see some remote operated drone standing somewhere near the Stargate, indicating that they did indeed send over an unmanned drone first to check whether... you know... there's air and stuff where they send their guys.