I use a Stihl string trimmer and bought the saw blade head for it. When we do trails, we like to have 2 guys on string trimmers (with the blades) and one with loppers getting the face slappers.
Someone else said to make it tighter than you think. Good advice. It will open up quickly.
Also a good idea to hide your entrances and also drop trees near the entrance. Hopping trees is a good skill to have and helps keep kwads out.
Plan on doing maintenance after big storms.
Bong