Re: Whatever happened to The Gallipoli Turks? and possibly an odd Camel?:
For the French the existing FFL in pith helmets are sufficient. For the Brits both HAT's tropical kit and Strelets British Camel Corps can be used (minus of course, the Lewis guns which were not in widespread use in 1915 - and certainly not in the Dardenelles).
If you look though at the photos of the campaign I can't think of any other (with the exception the Asia-Pacific theatre in WW2) where both sides look so motley and (as we say in NZ/Australia) so 'raggedy-arsed'). It would be good to try and capture that in any figures.