Actually,Sedgemoor is a little trickier to represent in miniature than it appears. All the Royal regiments were at half strength and if we use the recognised numbers you end up with a hell of a lot of rebel types to keep the ratios in proportion. Of course, if you aren't too anal about it you can use available ECW types to fill in or at least ensure some of your rebels can do double duty. The ones I have will also be available as assorted militia types.
There is a good little miniatures campaign available for Sedgemoor on the Volley and Bayonet website. No need to use the rules but the campaign mechanics are worth using. If you want to expand the scenario you could always add the what if of the Earl of Argyll's rebellion breaking out simultaneously and with somewhat more luck.
A restoration Army is a fine thing to have Helen. Relatively simple to paint and yes small. You can field Charles IIentire army without breaking the bank. Wonderfully versatile too, fight with the French/ against the French. Fight Moors at Tangiers, Dutchmen in Flanders or at Chatham. Crush Scottish religious maniacs outside Glasgow. You can even send expeditions to North America to fight rebellious Americans. Wonderful and largely, in wargaming terms unsung army.