Darceyyyy,
I had this exact same problem when I went to stay with friends for a week leading up to a wedding a couple years ago. I was new to incontinence and was constantly worried about it.
At first i didn't know what I was going to do, but after encouragement from family, I told the very good friend who was getting married about the issue. He switched rooms to share with me. He was really cool about it and wasn't weird at all.
I had told him i was really worried about the other guys finding out. He simply said "It's a disability. We all have issues, yours is just more noticeable than others....These guys will get it."
He assisted me in telling them so that no one would freak out after we had done some drinking.
Point is, it may be worth telling those you will be staying with about the issue. 99% of people understand immediately.