Why not go 1 way and come back another....a little change of scenery.
If you are concerned about bridges, then I-95 may be the way you want. I-664 near Hampton Roads has bridges and a tunnel. Plus, traffic seems to always be backed up on I-64 westbound between Hampton Roads and Williamsburg where the road goes from 4 lanes to 3, and again when it goes to 2 lanes. I-64 eastbound does not seem to have that problem.
If it were me, I would travel i-95 to get there, and the other route coming back......if tunnels and bridges aren't a problem. You will have to stop and have a VDOT inspection to confirm that your propane tanks are turned off before going through any tunnel......you can close the valves at the inspection station if you like. If I stop for a break within 50 miles of an inspection station, I go on and cut the fridge off and close the valves then to save a little time at the VDOT stations.
Chap , DW Joy, and Fur Baby Sango
2006 Ford F150 Super Cab 4x4
2008 Surveyor 263