Avoid trail during muddy seasons, riding can severely deteriorate the trail.
Certainly a shuttle-able section. The gravel road isn't overly treacherous though, so either make a loop, or shuttle and make laps :-)
Drive up Goodman Creek Road until you notice a clearing to the right. There's enough space for ~3 trucks maybe (Goodman Creek Trail juts off to the left). The "end" of Eagles is here, so you can either ride or drive up to the next widened gravel area, and ride down.