I saw something simular at a fishing road show once years ago. they used the lake water and pumped it in then overflow back into the lake. the tank was metal and it was painted with a marine paint. the viewing glass was Acrylic and was really thick bu it was 3+ feet deep. filters can cause grief cause the bio filtration needs to be maintained and if you are not using it constantly it dies so draining the tank isn't an option. look into your state laws though on holding native species some are not fond of it and can end up in legal trouble. you might need to get a temporary permit. good luck and post pics anyone who shares fish with the public is doing a great service to the sustainability of the hobby and the sport around them. as well as the environment.
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