I believe that there's no need for another medium unless it's a temporary housing for your installation method.
agreed, but as I haven't bought bees in the last 9 years, I turned to my old friend math..

3500 bees per pound, 2500-2000 bees per deep "frame of bees"
3x3500/2000= 5.25 deeps X1.36 gives us 7.1 mediums if they are drawn out, more cluster space per frame if they are not.
the package adult pop will take about a month to return to its original size, then grow rapidly
We get crappy weather often in may, even late may, a foot of wet heavy snow shuts down flows and flying fast and package starvation is a problem..
I suggest divert as they can use in weather too cold for syrup and keep a few baggs in the the truck march-end of may for just in case.
I was all ways a fan of frame feeders and use a lot of them, but with packages it seems we can get to cold for them to use it.
When you see the loose cluster size of 5.25 deeps, smaller in the cold, and shrinking for the 1st 25 days or so you can see how they could get marooned in 10f deep set up and unable to feed, if this is before they have time to draw some comb and put up some stores, their dead
The local advice for packages is a jar feeder on top of the inner cover (in contact with the cluster) and covered with a hive body will alow them to take syrup at lower temps.. the heat of the cluster warming the metal lid and the metal warming a few mm of syrup in contact with it.
I have no use for 1/1 and don't suggest any one out here should either, calories and calories and I don't see a benefit in feeding them the extra water, thicker suryp means less trips to fill the feeders