I have not tubed or caged ROD. But I should have tried. I have tried to hide most of it I planted over the years and almost all of it has been destroyed by deer browsing.
I have been toying with ways to produce durable ROD regen for a number of years now. What I've found most promising so far is the concept of protected seed bushes in areas where there is lots of open ground, and lots of brush piles to attract tweety birds to poop out the ROD seeds they pull from the cage. But there needs to be lots of open space and the right perches to attract those birds.
What's seemed to come on the fastest is ROD plugs. I ordered 60 of them, and planted them 20 each in a single hole. They're looking good. This has been going for 4 growing seasons now.
I have a lot of silky dogwood and ninebark doing great. I put them in 2’tubes for the first year then a 3’ cage for year two and beyond. After three Years they can fend for themselves and I rotate the tubes and cages to new plantings.