Get some brush killer for the honeysuckle and poison ivy. It doesn't take much so you won't be doing crazy spraying or anything. Just break a stem and spray directly on the cut, or brush on and it will kill the plant. I've had to do that with virginia creeper that tried to take over my gardens. Ripped out what I could and sprayed the cut stems on the rest. I'm more of a puller than a sprayer but sometimes you just have to resort to sprays to get it under control, especially when out in the country like I am.
Here in MO the issue isn't always drainage but rather the crazy up and down temps without snow cover to provide insulation for the plants. My plants deal with constant moisture then constant dryness then back all year round or like last year, just nothing. I've lost plants that had great drainage but just couldn't take the extreme up and downs we get.
