No easy way to move content between modules?

Hi all, I have a 5e game that I started in Lost Mine of Phandelver before the licensed module was available. We switched over to the licensed one when it was available and that was sort of a pain because we had to convert to the different OGL character sheets and all of the notes and whatnot on the previous maps were stuck in the old campaign. So every so often my players would need to open the old campaign to refer to something. Now my group has finished Lost Mines, and I'm doing some homebrew encounters and I plan on mixing some of Storm King's Thunder into the homebrew, and maybe Yawning Portal once it comes out. But it seems to me that in order to use SKT I have to make a *third* campaign, move all of the characters over, and then if we ever wanted to use something from Lost Mine, switch back. This is sort of crazy, that my players and I have to communicate which campaign they should be in which week and it only gets worse as more licensed content becomes available. Am I missing something, or are the different "modules" really this silo-ed off from each other. (And if so: why? I bought all the stuff, let me jumble it up as I see fit. I'd settle for some way to open two different campaign's Journal tabs and drag and drop from one to the other.) Related, in order to browse SKT content I had to make a new campaign. Is that correct? It sure feels like I'm missing something. I think the Add-Ons idea is supposed to help all of this, and Yawning Portal will support Add-Ons, but it sure would be nice if SKT and Lost Mines were retrofitted to be Add-Ons.

With the Transmogrifier (pro level perk) you can drag pretty much anything over. From any game you have. That lets you mix and match with impunity.  With a plus level subscription, you can move characters (or monsters) over between campaigns.  Addons will let you build up a single game with multiple bits of content, but larger things like SKT might not make sense as an addon, so I wouldn't expect them to be converted. 

Ah, thanks. I think my issue with moving characters originally had more to do with the Lost Mine module using a different character sheet style than we were using in the first campaign. I *did* move the characters, but they didn't survive the change very well and I ended up recreating them on the new sheet. But yes, the Transmogrifier looks like exactly what I want. I upgraded :-) Thanks for the info!