Reddit mentions of Bach for Guitar: Guitar Solo

Actually just had this sprung on me today (for a wedding this Friday, and I'm out of practice...yikes). If they want classical music, uptempo, major key Bach works well. I've recommended this Bach book time and again because it is easily sightreadable while not sounding too overly simplistic. Jesu, Joy of Man's Desiring; Awake, awake, a voice is calling; and the Gavotte from Cello Suite 6 are all suitable for recessionals.

If you have more time or already have some of this in your repertoire, I've played Nikita Koshkin's first Ballade, Andrew York's Sunburst, and Stanley Myers's Cavatina for recessionals before.

Moving into poppier territory, there are plenty of arrangements out there of Beatles songs that would probably be suitable. I've played Here Comes the Sun for weddings before (Bridal Procession), but a lot of the happier hits would be good--Something, When I'm 64, All my Loving, All you need is love, etc. I've had success with Disney themes as well. Kiss the Girl and Can You Feel the Love Tonight have both made their way onto my wedding playlist.