I know of someone (me) who lives in Leesburg (20 miles from Reston) and who would be willing to share gas expenses and driving responsibilities with you on a trip to Janes Island.
Also, there's good camping nearby in the State Park and this particular person has a surplus of camping equipment aching to be used. I've not been to the campground myself, but a good friend enjoys going there and has raved about it.
I'm going to send you a private e-mail to open the conversation.
- Big D
The Kayak Wing
Recreational Kayak Paddle