"Bin there - done that"
For two years I rode using baggy shorts and suspenders. Eventually I found these sidewinder truckers suspenders. They are fantastic! I wore the suspenders next to my skin (under my jersey) The straps are flesh coloured and are very soft (like bandage webbing). Because there are only two clips (one at each side), it's very easy to drop your shorts (!) and hook up again without disturbing your tops.

http://www.suspenders.com/hipclip.htm

I recommend them highly. However, I have since bought three pairs of bib shorts and my life has new meaning