Our R25 had full enclosure curtains for the bimini that I think were made after the original purchase. We usually run with only the bimini up except in foul weather. A couple of things we learned: The curtains were all screened which is great but probably overkill. One zippered screen panel on each side is probably more than enough. Fully agree with the idea of having the strip with the zipper on each side of the cabin. This makes getting aboard and out so much better than coping with the snaps. All the suggestions preceding this post are really useful. The flaps to allow access to the mooring cleats are essential.
What did we change? The entire enclosure was navy blue, and it was darker than you-know-what inside with all the side curtains up. We had the rear center curtain panel replaced with a polyvinyl chloride window panel that will roll easily for storage, and dramatically increase the light in the cockpit when you want it. We added a lightweight curtain material that easily hooks on the inside of that window curtain for privacy if desired. This can also be done with additional snaps.
One other thought: Our navy blue tops have black zippers. These zippers are almost impossible to see after dark, and therefore difficult to put together. I would recommend white (or contrasting color) zippers for ease of assembly regardless of the material color. We also added a flap at the bottom of the section over the stern door that folds up and snaps on the inside of that door because the birds found that opening under the edge of that panel into the cockpit. The only water we get into the cockpit comes from the roof gutters on the cabin.
The storage bag we have is flat and the same size as each curtain folded in half, except the rear window, which we roll and put in the bottom of the bag (never fold a PVC window panel). Allows the curtains to be stored and removed in the order that we install them. Stows well in the cave. Fabric handles make it easy to handle and retrieve.
We also numbered the curtains with a marker next to the top zipper to make installation easier.