realize it's a function of tank sizes, but how many days between emptying tanks are realistic / typical for 2 persons when "boondocking" (hookups not available)? or maybe a range? thanks!
The "ultimate" boon docking experience is to stay out in the desert at Quartszite AZ. We did that a couple of years ago and found that with myself and my wife, we could last a week on the grey tank which is 60 gallons. We had bottled water to drink, and took navy type showers. Typically the black tank is not a consideration as the grey tank fills up much more quickly.