Having never boondocked, I am not sure of the requirements, but the sides of those roads may not lend itself to boondocking (in my mind). There is a good sized parking lot at the Food Lion - but have never seen anyone boondock there. I bet you would get a good view from the Wallops visitor center parking lot, but have never seen anyone boondocking there either - and they close up right at about 5:00 pm with a gate. Do not know if this changes around a launch. It would be cool if they allow it at those times..
We camp in chincoteague every year - will have to check the schedule and see if there is a launch that coincidences with our next trip.
HTT: "EscapeII" 2016 Shamrock 23WS (current)
PUP: "Escape" 2010 Rockwood HW 277 (gone)
TV: "Bruce" 2011 Dodge Durango V8 Hemi Crew
Just us gals (me, Sis and our daughters)
Traveled 19520 miles and 209 nights in 7 years and counting