Ok so here is my stocking plan for my 1 acre pond
Spring:
FHM -10 lbs
HBG 3-4"- 50? 100?(4-6" is also avail)
YP-3-4" 200 (4-6" is also abail)
Crayfish 100
FALL
SMB?
FHM if needed
There is no need to buy the larger HBG. The 3-4" size in fine now. When you go to restock, then it might be prudent to stock larger fingerlings as it will reduce the number of fish that get eaten by already present fish. IMO you also don't want them to spawn before your SMB and YP are established in the pond. You want most if not all of their offspring eaten.