Welcome Trevelyan
It's been a long time since I owned a 22 but I took it all over and dried out a lot, usually with the legs I made.
My long shaft outboard probably stuck down further than your prop but was never a problem.
In soft mud (at least 9" deep) legs are not needed but the prop will also go in the mud. This is also no problem unless there are hard bits in the mud, but I never found any!
The cutlass bearing and wear is more of a potential problem with the flat bottom hulls such as my 26 or the newer 27,275 etc. where the prop is nearer the ground. I have fitted a water fed shaft seal which discharges down the shaft and so cleans out the cutlass bearing, which seems to have greatly reduced the wear.
Philip superseal 50 rascal