Our average was probably 2-3 days with some remote spots being a week. When we moved to a new area/state/country, 1 nighters unless we ended up on a lake or river which would become 2. Some of our favorite long stays were in spots with lots to do around it and on or very close to a river. We were full time so down days were essential to pepper in along the way. We did spend almost 10 days in a large forest, hot spring jumping, with one spot becoming a basecamp for 6 days (IIRC). If it was someone's house and free, 1 to no more than 2 days depending on if we'd need something special in the area or if we ended up helping them with a project. We did live in someone's yard for 2 months but we ended up house and pet sitting while they dealt with cancer treatments in a large city ~200 miles away. Usually we ran out of food and were forced to move if we happened upon a perfect free spot. We've done months entirely free camping, boondocking, stealth, pirate...whatever. FWIW, in other countries Overlanders seek out someone with a decent amount of tools to "camp" in their yard to perform repairs or upgrades. Usually there is a cost but it's a great way to make new friends. We spent a fair amount of time "camping" at mechanic shops or at the homes of mechanics to handle things on our van. No matter the country, gear heads just can't help themselves.