Re: Wood Filler Problem
As ****ie and Jack pointed out, wood plugs will be the the least noticeable method to cover a screw. A brad point drill bit to countersink the screw head and a plug cutter will run you less than $20 and provide an almost invisible solution to your problem. The thing I like best is that you can select the wood that you're collecting your plugs from and custom match the grain and wood species with the project.
An alternative would be to use finish nails (smaller hole ), finish the project with the stain of choice, then use Color Putty to fill the holes (after staining ). With Color Putty you can mix a variety of premixed colors together to make a custom color that will all but disappear when applied.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!