Thanks. I'd guess that a weekend day game would be best for most people, as with past tailgates? That would help us narrow down potential dates, too.
Edit: For future planning reference, looks like the P-Nats have home day games on April 13 and 20, May 4 and 25, and June 1 and 8. All of those are at 1 p.m. on Sunday. Also, they have day games (2 p.m.) at Frederick on Saturday and Sunday April 26 and 27.
Looks like the Washington Nationals are away on only two of those dates: April 20 and June 1.