I fish Truman, it is huge, get a good set of maps or be good at using your gps in your car/truck to find other pts to launch. Truman cut off dozens upon dozens of dirt roads that still dead end in or close to the lake. I've got a set of DeLorme topo maps for the area, use my gps, and maps of the lake bought online to find every access pt that will save me time. That said, I don't mind paddling a mile or two up or down to fish, the reason we like kayak fishing is it slows things down, makes you more thorough, and gets you exercise all in one package.
You don't need a ramp, anywhere someone can bank fish, you can launch. Get or build a cart or set of wheels if you find good launches that require more than a couple dozen yards of portage.
The best way to get to where you want to be in the future is to act like you are there TODAY.