Instead of thawing them first and then curing them, I strongly suggest you put them into the curing brine while still frozen. This will thaw and cure them at the same time. This will also prevent further damage to the egg sacks membranes because the sodium in the brine cure will immediately start to toughen them before they thaw too much. After they are thawed, continue to leave them curing in the brine a little longer. Then drain them off and pad dry them down gently with non inked plain white paper towells. Then rack them out to dry and tough before before using; or freezing again. If they seem to be somewhat gooey after this process, including the air drying after the brine thaw/curing, then roll them in borax to further toughen and dry them up for river fishing. Good luck. If you do this correctly the eggs should still fish well.

RT