"always find it a bit difficult to actually organize things on my backpacks" me too.
As I'm sure you're aware, there is no perfect bag; backpack, messenger, or tote to accommodate photography and hiking. Especially if you plan on being out from dawn to dusk. I too am a coffee person. I typically carry my Adopters but I grind my beans the night before and store them in an airtight container from Planetary Design AirScape (I'm not getting a kickback). They have several smaller sizes that can easily be carried in a backpack, messenger, or tote.
I typically use backpack/tote from Case Logic (see attached picture) that has backpack straps but has a top sinched (drawstring) opening at top, two inner vertical padded pockets that accommodate a 13" laptop and either a 10" or 7" tablet (for me they're Kindles). I usually take the padded sectioned insert from my Tenba Messenger DNA 13 (see attached picture) to hold my photo gear that sets at bottom of Case Logic pack.
As I said, there is no perfect solution and believe me when I say I've tried every type on the market (I'm 73). I hope I've been a small hope.
Regards,
GEGJr