Hey Brad:
A 25-foot drawdown is tough to deal with, especially if it's not predictable and the level fluctuates through the year. The lakes I fish don't get drawn down nearly that much but the levels do change throughout the year on one of them so we have to maintain condos there from the shallows down to 40-feet when the lake is full.
The ideal situation if you can find it, is a point that extends gradually into the channel but drops off quickly on the sides. Then you can put condos at different depths down the point from near the bank down to or near the deepest water.
If you stager the depth from two to five feet and still keep the condos 30 or 40 feet away from each other you'll have an area that you can catch fish year around at any lake level. These areas are easiest to find when the lake is at its lowest point. Then you can see the shape of the points, find the top easier and get a mental picture of how the point continues underwater (along with your electronics of course).
If you can find some bamboo in your area you could wait until the lake is down to put your condos in – you’ll be catching fish on them the next day so there’s no need to put them in now while the weather is hot and you may have a better idea of what the average lake level is going to be through the winter.
I’ve come up with a new design for bamboo condos that should work real well in this type of situation. The nice thing is you can carry everything you need to build one in your boat and you can build it in your boat and drop it in about 10-minutes with someone helping you.
We’re going to sink some this week so I’ll try to get some pictures. They are simple and fast to build and the ones we put down last spring in shallow water were very productive. We haven’t tried them yet in deeper water but I think they are going to work real well.
All you need is two 8 x 8 x 16-inch cement blocks, about 3-feet of nylon rope and 15 or 20 nice bushy stalks of freshly cut bamboo 12 to 15-feet long or shorter if you wish. I fold the front seat down on my boat and put a towel or piece of carpet on the back of the seat to protect it and set the blocks there with one on top of the other with the holes horizontal and at right angles and tie them together.
With one person steadying the blocks and the other person getting the bamboo from the bottom of the boat we cram the bamboo in both holes in each block from both directions. We line up the blocks so the holes angle off to the sides so the bamboo is hanging off each side of the boat towards the back and out over the front – the ends are usually in the water.
We put the bamboo through the holes so that about a third of the stalk is sticking out the other side and put as many in each hole as we can with about equal numbers from each side. You end up with a big cross about 20-feet across - depending on how long your bamboo is - with four big heads and some open space in between. Once assemble we just pick it up by the bamboo near the block and walk it off the front of the boat and drop it. They come up about 6 to 8-feet off the bottom depending on how bushy the bamboo is.
We try to us bamboo that isn’t too big – 1-inch or less in diameter where we cut it – so we can get plenty of stalks in the holes and they aren’t too buoyant. We put the bamboo in the boat with the butt ends facing the front so we can pick them up easy to put them in the blocks.