Yes, 1st of May probably a safer bet. On the way in, be aware that Odd Road and Farley Creek are one and a half lane back roads - rideable fun, but with due caution.
EDIT: I was thinking Pluto Road out of Shady (1 1/2 lane) instead of Farley Creek/Mount View. Mount View Road might be a one laner all the way thru to 3...maybe Ok maybe not with a group...may be ahead to just stay 19 on into Shady Spring to pick up 3. 3 is a good ride, you'll like it.
On the way out, if you are going to end up in Christiansburg anyway, you might want to give Rt 311 from Crows, VA (White Sulphur Springs, WV) to Salem, VA a look see. On 311S, just short of Catabwa, VA there is a cutoff road to the Blacksburg / Christiansburg area...VA RT 785 I think it is. A MUCH MORE FUN way to get from Lewisburg to Christiansburg for about the same mileage.