I am facing this same dilemma

as of now we will be having 5 groomsmen and 3 bridesmaids, his brother, 4 of his friends, and my best friend, two of my friends. I'm thinking of asking his sister-in-law and one of the groomsmen's fiance, actually will be wife by the time of m wedding
He doesn't have relationships with most of his family so I thought this would be a good way to get his family more involved and I'm very friendly with his friend's fiance and I'm kinda a back-up bridesmaid for her wedding because one of her bridesmaids may be backing out - we have been getting closer since we both are engaged.
I really didn't want a big bridal party because I really only wanted people I was really close to for my most of my life - my MOH and I have been friends for about 13 years and the same for my other bridesmaid. My one bridesmaid is younger, one of my former students from dance who I'm still very close too, she'll be 18 once we get married and her and I think of eachother as sisters. When i first met my fiance, I was still working at the dance studio and she was about 13, she said 'I think you are going to marry him and if you do I wanna be a bridesmaid!' My fiance actually showed her my ring beforehard to get her 'approval'. hehe.
However, I really don't want to make him chose between his four friends, and the other problem is we are having an intimate so if i choose other friends not already going, my guest count goes up.
i think if that's all you want, then go with it, have two groomsmen walk each bridesmaid and you really don't have to have a slow song for your dance. instead just have your whole bridal party dance together to a faster song and switch partners so no one dances alone.
So that's my very long reply... I really got to get to cleaning....
