Tent camping (closest we got to boondocking) we always used the enameled steel coffee pot that sat in the coals of the campfire. Grounds sat in the bottom of the pot, the coffee was just fine. I think you can now find similar pots with percolator innards, and if you are particular, you can still get a two-part drip coffee pot, and even put a filter inside that if needed.
Over the years, I mostly drank perk coffee, sometimes we kept a 20-30 cup urn going a couple of days, so when the filtered drip coffee makers showed up as consumer products, I found the beverage produced kind of bland. But tastes change, generation to generation.
With coffee ground finer for filtering, you use less coffee to make more beverage (which is why the restaurants use the method, saves money). What I miss is the burnt taste of a percolator or grounds in the bottom of the pot.
If you don't want burnt coffee, and you want a filtered beverage, I don't think you can do any better than a Melitta filter. All you need is some way to heat water, then you pour it into the cone.