[GpsFrontier]

Bigfork, at the north end of Flathead Lake, about 35 miles south of Glacier National Park.

I see it on the map. That's beautiful country there. I once had a delivery off of I 15 about 40 miles from Canada. looks like you are half way between where I was and Idaho, then just a bit south. Some of the most beautiful country that I have seen is between Spokane WA and Bozeman MT. I didn't get up their too often but loved it when I had the chance. Most of my runs were to Denver CO, though I covered the 11 western states. Occasionally I had runs east, one as far as Edison NJ from Oxnard CA.

you could make a meal of just corn, eating half a dozen ears

I cant agree more, I often do just that when it's in season. I used to eat the yellow corn until once I had some real fresh white sweet corn. From then on I only get the sweet corn. It's the sweetest when it's freshly picked and the shipping time to the store can take a toll on the freshness. But from time to time I get some real sweet stuff. This town (Lake Havasu AZ) is to small to have a farmers market I guess. I haven't seen one.

I plan on my setup on the end of a long deck, about 12 feet off the ground....the reservoir will be down below so I'm gonna need a pretty hunky pump to push the nutrients up and thru the system.

That distance up can be a problem. If you were able to raise the reservoir up like building a stand or placing it on a table to cut the distance it needs to go up, that could be a big help. I attached a picture of a pump that I got at Lowe's a few weeks ago for $45, 300-500 gallons per hr and up to 8.7 feet high. The system that I am going to use it for will only be 2-4 ft high.

I'm wondering also about including a bucket or two of summer squash and cukes...do you think the nutrient requirements would be compatible?

I think as long as you change the nutrients every week you should be OK there provided the pH requirements are the same depending on how large of a nutrient reservoir you would be using. I could be wrong but I think they will all be heavy feeders, so I would change the nutrients every week instead of every two weeks. Also I would want the reservoir to be large enough to be able to feed all the plants without the nutrients being depleted too fast.

pH requirements
Sweet Corn 6.0
Squash (Summer) 5.0-6.5
Cucumber 5.8-6.0

I think if you keeped the pH at 6.0 they would probably play fine together. I don't have any experience with these crops yet although I am going to have summer squash planted in about a week (the seeds have already sprouted). The summer squash will be in 5 gal buckets like my broccoli plants and will be a drip system. But will be using the same reservoir as my peas, snow peas and green beans that is a flood and drain system. I need to put a one way flow valve inline with the drip system (summer squash) or the flood and drain system (peas, snow peas and green beans) wont syphon back properly because they will all be using the same pump (the one in the pic).