I love film, I miss it. But for long distance hikes I'd go digital. You can pack a gazillion pictures on an SD card while you'd need two bricks of film (and would be changing film in rain or wind) to get even close to what you'd want if you take a lot of shots.
First, start by looking at what you're going to want to take pictures of. If you shoot wildlife (especially birds), you're going to want a long zoom with decent speed. Or a camera with a ton of pixels (like the Nikon D850) so you can crop like crazy. And frankly, it doesn't sound like you want to go either route. If it's primarily landscape, than a wide angle with a wide aperture (which will work in low light) covers a lot of bases (smaller, lighter, allows you to shoot what you want).
Second, as for support equipment...either get a tripod that is stable or don't bring on and look for an alternative (bean bag--I have know a couple of photographers who use a bag of beans or rice as one so your food can double as a bean bag). A bungie cord (strapped to a tree or fence). Consider filters--to get pop in the clouds, to shoot blurred water during the day, or shoot sunsets (the type of filter will vary with what you want to shoot). Definitely some kind of microfibre cloth to clean your lens and wipe off dust. I'm a big believer in a zip log bag to put the camera and lens in--deals with heavy rain, dust and dirt and you can probably find an alternative use for the zip lock bag if the weather ends up being perfect.
Since you're a serious hiker and you've got a blog, my advice would be to do something like take a picture a day (so the camera feels less like an anchor but more like a critical daily tool--like your backpack is). Make a daily post and it has to include a picture.