Texas Guess? No, Texas Guest - as a member of the North Texas Celtic community I am well aware of the MSFest (run by a member of the band known as - Legacy) and have been told by several performing peers that it is a small, but wonderful festival - I've heard nothing negative about it.

As for your guitar? Consider taking it along for jams and sessions as they are supposed to be plentiful; and, you never know what you may learn, or be able to impart to others. Have a great time and look for a wonderful Scottish band called Smithfield Fair - you don't want to miss their set.
Cheers.