If it is a 3lb package I would go for one deep to start with. Since all frames are drawn out it won't talk too long for them to get things going. Once they start raising brood along with storing pollen & honey, keep an eye on frame usage. Just like any other box I add a deep when 70% to 80% of frames are used. Main thing you want is to help them get their numbers built up. It's going to take up to four weeks for newly raised brood to emerge from cells, depending on how fast the queen starts laying eggs.Installing a package into a hive the bees disappeared from last year. All frames are fully drawn out. Should I install into one deep box, or use two boxes right away? If two are used, should I put a super on right away as well? Thanks !!