Management through Supervisors

My next step in this hotel is going to be becoming a supervisor. Currently we have one supervisor for each shift and I have been told by my manager that he would like to make me one soon in the future. I have found that the supervisor is a good means to manage ones employees because they are more like a coworker and less like "the boss." I am excited to take this step because I have found most people in this industry got to where they are by taking it one step at a time, even our general manager washed dishes at a Starwood Property to start. I also feel that it could be a step back for me to take such a low ended promotion being as I went to school for a career in the tourism field. I wouldn't like to insult anyone by declining it but I feel if I do it puts me on the path to being stuck in the roll of working my way to the top. I am waiting for a position to open up in our sales department at the moment and am pretty excited about that but I can't decide if it is a bad idea to take the small step to supervisor while waiting because they may get the wrong impression.