Well I have my playset in a folder, three of each card. Demo decks in coloured sleeves for demos, encounter in black and have left the 2nd and 3rd encounter sets at the store in case they are needed. Everything is protected, no chances
You can get the sleeves on their own and put them in your own folder, or you can get folders with fixed sleeves in them.
The Ultra Pro Pro-Binder with sleeves in there have 360 places for cards to go into, so should get the playset and the Mirwood stuff without a problem. Then it will get in 3 full campaign sets (18 releases) or 2 deluxe expansions and 2 campaigns for LOTR.
You are looking at less than $20 for about 18 months worth or releases
All my Game of Throne and Warhammer Invasion are in the same folders