I keep thinking I should downsize my garden. Then I think about all the awesome varieties of rare corns I could grow... Then I think of where I could expand my garden...lol. They are a couple I'd like to try .
Do it! Corn does great along a fence or in a raised bed. The only tricky thing with growing different types is timing the pollination. Don't have your flour corn tasseling at the same time as your sweet corn or you'll end up with odd hard kernels in the latter. (We had occasional stray blue kernels in our second wave of sweet corn, but just dug them out.)
Some people think I give away stuff because I plant too much. No. I plant too much so I can give it away. Extra produce is never wasted.