WHAT? A river? I thought this was all about Pirates in the Carob Bean Sea!
Calm yourself, young GrassChopper, it is as you say it is. But, if you will reflect back on earlier posts, it was mentioned that the terrain will be built for versatility beyond the two planned games plus the play test - and maybe a fourth outing locally if it can be arranged. The photos you are about to see will show some of the "curvaceous" pieces that are on their way to becoming the islands for the game (well, the larger ones, some of the smaller ones have yet to be photographed) and a bit of the diverse ways of arranging them - but not yet shown as they will be arranged for the game. Need to keep something in reserve to lure you back for more, yes?
If you study the above image with some care, and one of the lower ones, you will see the four "national" islands that will be used in the game. They are the four end pieces, two on either side.
The middle pair of islands are the north and south native islands or - in this arrangement - Turtle Island.
And the set on the left is the pirate island, the bigger one of course, and the mangrove swamp island - and, yes, the mangroves will "leak" onto the pirate island.
What game scenario can you imagine using this setup with those two sharp corners at either end and the narrowing of the river/canyon by the "peninsula"?
What you see in the photos above are two pieces of underlayment cut to match each other, a bottom piece and a smaller top piece. These will be separated by furring strips I've ripped into 1"x1" pieces which will be glued and screwed together. Then there will be insulation foam stuffed into the open areas - on the gaming faces only, not the ends or back. Once that is done, a layer of wood glue goes down and will be covered with fine sand and once that is dry it will be time to paint - four browns below four greens.
And one last thought for you to consider - if it hasn't occurred to you already: go back up to the first photo and imagine the two sides being moved so that they are back to back. A four foot wide by nineteen foot long island? Or is it the same size plateau? I haven't tried to tally up all the possible arrangements of the game pieces and the extra extenders and corners but I can sure imagine a lot of uses for them however they are arranged. Hey, how about a pirate game?!