Ok guy I just got back from trying to do a little scouting for a better spot in FBF.
Regarding this spot,
I didn't see the road circled in red at all. It's probably there and the entrance is just covered by greenery, but I don't think you can drive down it.
Regarding this spot circled in blue,
The road circled in red is not blocked off. However, at the entrance there is a sign that says restricted access to fish permit holder only, I went in anyway and a little further down there was a Do Not Enter sign so I turned around. Not sure if this applies to just cars.
Regarding the BJs spot, didn't people stop going there because they were getting tickets? I think I read that.