I finished these pieces of French artillery equipment for my Gilders' recent first outing. The horses, limbers, caisson and drivers are Hinton Hunt; the gun is Newline (actually the one from my Spanish "horse" artillery); and the howitzer is a Hinchliffe 20mm model, from the Peter Gilder collection.
They show the technique of leaving enough room on the base to accommodate the gun hitched behind the limber. For my British RHA I have used a variant, with limbers having a two horse team, but then having some extra bases of two- and four horse "add ons". This is partly because basing a six horse team and limber and having space for a limbered gun is unwieldy; partly because I don't have enough horses for all my British limbers at four or six horses each.
I have some Hinchliffe 25mm British baggage wagons I bought from Terry Wise once. These have teams of Jacklex oxen; the wagon is on one base, the team on another, and there is a single long sabot base they can both be placed on. The wagon's base is permanently glued to the sabot, the team is not. This would also give you the option to swap horse for oxen draught if you prefer.
As ever the usual disclainmer - this is not a painting blog, I know I am not a good painter and my style is limited to achieving as neat a block painted finish as I can manage. The idea is just to show the toys....