I've never found longer longbows -68 inches or so -- difficut to move through the brush. They're quite easy to move through the brush, in fact. Less likely to hang up than a recurve.
Straight, Hill style bows are long for a reason. When you draw a straight bow, the tips are pulled closer together as you reach full draw. That increases the string angle (increasing finger pinch) and begins to stack.
The tips of a recurve or hybrid mostly move to the rear, but not together, as they are drawn. This lessens the rate at which the string angle increases.
Can probably shoot a 64-inch Hill style bow with a 28-inch draw without too much of a problem, but a 60-inch bow will likely stack a lot at that draw length, and finger pinch will be noticeable. I shoot mostly 66-inch Hills and wouldn't go any shorter for my 28-inch draw length. My next one will likely be a 68-inch.