Southern Oregon Transportation companies?

Hi all! I'm having some trouble finding local companies in the Roseburg area that have minibuses (16-25) available for our wedding. The roads to our venue can be tricky at night and we want people to have a good time and not have to worry about driving back to their hotels (probably 90% of our guests are out of towners). Has anyone worked with a reputable company that has a good hourly rate and milage plan, since they will likely be having to go back and forth from the hotels to the venue several times through the evening? Thanks!