A supply of refreshments, like soft drinks, coffee, tea, and water, plus a buffet-style meal, would be much appreciated by the musicians especially, if it is for a wedding as it will likely be a long day for them. Check that they can park vehicles as close to the church or venue as possible to save time unloading their equipment. If you are having an event outside, your acoustic band will need some cover like a gazebo, and electrical supply. Always check the venue for a sound limiter as it may dictate the wedding band for hire. An acoustic Duo and solo acoustic act will not be affected by a sound limiter.