One thing I really enjoyed about flying my old airplane was flying into backcountry strips. What are backcountry strips? They are airports that don’t always have a paved runway, or even a runway at all. It could be a dirt airstrip, it could be a gravel bar, it could be a dirt road. There would most likely be picnicing or camping involved at this destination. Or it could just be a quiet place for me to visit and gather my thoughts or pray. Here is a Google map of some of the back country spots I have visited and some I would still like to visit.
A great resource for backcountry flying is this site: BackCountry Pilot dot Org
Air Prayer 
You say the Hoover Lake Airstrip has trees planted in it. My question is the current imagery in Google Maps accurate? I see an ~800 ft long stretch in which no obstacles appear. I could land my Maule in there comfortably.
There is more vegetation now than appears in the Google imagery. I’ll take another look but it didn’t look good. Paradise Flat was perfect. However, I will cop to being overly cautious.
Thanks – I can bring my bike in the Maule. Would love to drop in there and ride for a few hours and then get out. It’s far enough from the ranger station that I don’t think they would notice if I quietly slipped in.
Let me know how that works out. I want to fly into Paradise Flat and stay for a while. Just don’t want to get the local gendarmes worked up.