Liz, Edna is about 40+- miles from Magnolia Beach, I'd think yall would probably find a place to dump closer than that. The City of Port Lavaca used to have a RV dump site, but I can't get the web site to come up.
If anyone is in the area early enough and interested in a little sightseeing trip, I'd suggest the re-enactment at Presidio La Bahia in Goliad Texas on March 27 & 28.
http://www.presidiolabahia.org/ I've been and really enjoyed it.
Liz and anyone else coming through my area, pm me and let me know the dates. If you don't believe what Mitch says about me
and want to meet me or stay overnight in my driveway, we can work out the details.