Successful outdoors is not easy, stay away from state parks, plant where it's ugly and nobody goes not where it's pretty and lots of people go for hikes. Go for long drives out into bumfuck and then go for a long hike trying to find spots nobody goes to. Don't expect much(for the first year or two) and don't get greedy by planting a whole bunch in any one spot. Sticking with indoors is not a bad idea.