Not sure what stop in Pflugerville you picked, I'd change it for you.
http://maps.google.com/maps?f=d&hl=en&geocode=7357126841536701834,32.744370,-110.647340%3B18338524560531545621,29.429010,-98.500850%3B15406564415944375361,29.843160,-97.669020%3B4687663845081471750,29.981300,-90.311830%3B6106197270183298757,34.578120,-82.695300&saddr=Anaheim,+CA+92808&daddr=AZ-77+%4032.744370,+-110.647340+to:30.420256,-97.67395+to:US-183+%4029.843160,+-97.669020+to:I-310+S+%4029.981300,+-90.311830+to:I-85+N+%4034.578120,+-82.695300+to:Bethesda,+MD&mra=dme&mrcr=0&mrsp=2&sz=8&via=1,2,3,4,5&sll=30.225848,-97.371826&sspn=2.012387,5.141602&ie=UTF8&ll=32.379961,-110.654297&spn=7.864148,20.566406&z=6"
I've added the County Line BBQ on the hill for you.
http://www.countyline.com/comeseeus....n%20the%20Hill)
It shows a Java 360 of the Hill Country view, I think you'll like it. You can also do the one on the lake, just as beautiful... it's up to you.
You'll be driving through Fredericksburg TX. It's a very small, but clean town in the Hill Country. Just FYI, it's the birthplace of Admiral Nimitz and damn proud of it. It has a nice town square, and some great Beergardens.
Have fun and happy eating.