I'm going to revise my choice for this type of use. Camping and biking mean to me that one camera might not suffice if going Panasonic. I do not think that the OM-3 will give acceptable levels of noise inside a tent at night unless with a small light; nor do I believe the S9 by itself will give acceptable levels of weather resistance (by the way, I doubt the Panasonic 14-140 does either even though it's rated weather resistant).
Therefore, I would still go for the S9 with a 18mm f/1.8 lens for dark, inside a tent scenes and the 28-200. For bad weather, I'd get an action cam. This will eliminate bad-weather low light; maybe pick up a camera cover for the S9. At MPB, that setup will set you back 2500 euros.
The other option is the "do everything" set-up with the OM-3 with the Olympus 14-150 ii and the Panasonic 9mm for about the same amount of money, but you'll be spending more on the camera (double!) for less quality output (but still great).
If you are a disciplined shooter that usually uses a tripod and manual focus, there are options that will cost way less.
That OM-3 setup is about 950g and the S9 + action cam setup is 1300g. Note: Camera size doesn't have the Panasonic 18mm list, but it's the same size as the 24mm.
Again, this is for 10-bit with great IBIS and AF being the priority. I'd go with a much cheaper setup if it were me. I wouldn't want to take that expensive of gear out into the unknown. It's a close call though. There are so many good choices. It almost makes you say "screw it" and just use whatever you have with its limitations. If you're a creative, this is usually better.