I did that when I started, didnt know anybody at all. I asked around in the evening and the morning who was doing what and if they thought my truck could do it.
There havent been any organized trails or leaders (except vx run) since I've been going. It all seems to work out fine. Show up at the stoop at night and see whats going on, a lot of ppl decide by then what they are going to do. And show up before 9am and ask around again, might find a trail you would rather do instead.
One change I will be making for any trails I lead, I will not be waiting around. Everyone should be ready by the time I am or they miss it. You should know when you get back the previous day if you need gas and food, do it then.