Here's a wacky idea, but if you are already excavating and bagging lots of clay, maybe it's a possibility.
If your clay is really sticky, and you don't mind wheelbarrowing a lot of it around, it might dry into something hard enough to use as walls for an RB. A REALLY raised bed!
Maybe use the excavated clay as the foundation and walls for an elevated, raised bed, both to improve the drainage and raise the soil surface up so you need to do less bending over to weed and sow.
Accumulate the clay in a shallow pile in the shape of the RB you want, until it's a platform 18" high and wider than the planting area you want. Then hoe the center out into tapering walls or berms around the periphery of the bed, so that the walls are 8-12" taller than the center. Slope the center "floor" or cut channels for drainage, and pierce the walls where the low point of the "floor" drains out.
Then fill the bed with your good soil mix. The bottom half can be less amended than is ideal because it will improve over time from from organic matter leaching down each year , and worm and root action will gradually give you a deeper root zone.
Just a wacky idea. If bending over is difficult enough to make an elevated bed attractive, wheelbarrowing tons of clay around is probably much too much work! I just hated to think of it going to waste.
