Dave's suggestion to use a plug is a good one, however remember the reason for the bolts is knock down for moving, so the plugs will have to come out at some point and go back in.
I used the Lee Valley bed bolts once and they are great, but the last job I did, I just went to Lowes and purchased Barrel Nuts and bolts with washers, pretty much the same, barrels are just not brass. I used a leg carving to conceal the holes.
For less solid construction, there are many other hardware options on Lee Valley's site.
Pure mathematics is, in it's way, the poetry of logical ideas. - Albert Einstein.