If I was in your shoes, I'd stock HBG and CC and pellet feed them. If you think you are able to catch a few local bass from an area pond that aren't diseased and you are certain you can ID the sex, toss in a dozen male bass as well. Catching male bass is easy during the spawn if you can sight fish for them. Even just one bass of either sex would be fine. Better to only have one bass than make a mistake and mix sexes and then your pond's dynamics would change greatly...
This combination is high turn over. So losing the fishery isn't going to set you back much. It'll produce many 1/2 to 1 pound sunfish which the kids will enjoy catching. The small number of bass and your stocked CC will limit or completely control successful reproduction of the HBG which is wanted. The CC will be an added bonus of the occasional larger fish up to 10+ pounds but most will be in the 1-3 pound range. The few LMB in the pond will not be a focus of fishing but rather simply to help the CC control any HBG reproduction.
Annual stocking of 300-400 HBG and 100 CC will not be overly expensive but will produce a quality fish if pellet feeding is done. If the pond does go dry, you're not going to be set back 5 or 10 years in your fishery. At most you'll be set back a couple years or so and you won't have lost much. Most HBG live about 3 or 4 years tops and CC will mostly be caught and put in hot oil in that same time period.
