Once singles are obtained, immediately place in a womens nylon and leave in the river with a bit of current running over them, this will water harden them , 1 hour is good.
Or you can do this at home with cold tap water but not nearly as effective.
Next I color a good portion using various colors of bait dye, the new BAD AZZ dyes are exceptional, my old stand bye was ROE GLOW, but Roger stopped selling it.
Now simply either tie bags or store as just singles in the fridge, add to them PURE ANISE, which aside from being a scent attractant , is also a preservative and will leave you with juicy little eggs that have all the goods.
A friend and poster from this site turned me on to using sea salt to store them in, it also helps preserve the eggs and the last well stored in water that has been saturated with the sea salt, again try adding PURE ANISE to this solution.
Another great option is to take your favorite cured egg chunks and tie roe bags with them, this was my favorite approach , as you get great smell and milking along with the longevity that having it in a bag gives you.
But hey, it's steelie season, I don't need frickin eggs to catch steelhead
, but if your desperate ;D.