Art,
The easiest way to get to Lake Julia is from the south side of the forest at the parking area on Reasonover Road. From there you take Conservation Road, a gated forest road, to the old landing strip. This about a mile of a very good, rolling, gravel road. At the landing strip you turn right on Camp Summit Road going about a half mile downhill to the lake.
You can download a map of the forest at [url=http://www.dupontforest.com:b2a20]www.dupontforest.com[/url:b2a20] or pick up a nice waterproof edition at Backcountry Outdoors or another outdoor outfitter.
Next time I make a trip there I will drop you a line to see if you want to go.
Bryan