Playing Multiplayer alone

The first time I played BGII years ago on my mac i made a party of my own creation and added a couple NPCs as i journeyed through the game. This allowed me the chance to play a monk, sorcerer, paladin character all on one play through. Will BGIIEE still allow me to create my own party like this? Thanks for reading.
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Edit: But u'll obviously miss out on a lot of NPC interactions and quests, and won't be able to access any of the new Enhanced Edition content, which is associated with the new NPCs.
For example I never got to see Nalia's quests, even though I had her in my party for the De'Arnise Keep, and had the Keep as my Stronghold. Similarly I never got Keldorn's quests, or Mazzy's.
I haven't actually tried out the EE characters in BG 2 yet, but I know that their quests, romance or not, are also spread over the entire game, and they only progress by having the NPC with you, so I never got to try Neera's quests in BG 1, even though I had her for a short time in the party.
Note: Some of the new content is still quite buggy and looking for workarounds here will invariably involve spoilers. But some of it us quite good and challenging (I especially enjoyed Rasaad who is my favourite new NPC as well).
I'd recommend keeping 1-2 slots open for NPCs. Akso keep in mind that with a custom party the game will be quite easy.
An alternative: with EEKeeper you can edit savegames and customize the normal NPCs to fit your expectations. Changing weapon proficiencies on Mazzy, adding a kit etc. are quite common and that way you still have the interactions and more of a challenge (if you keep yourself to minor edits ahd not boost all stats to 18....
Same with Rasaad — no time needed. After you recruit him, just go to the Gates of Athkatla. His quest will be triggered immediately. Then you can get rid of him.
Both of their quests start relatively soon in ToB (after leaving Saradush), so there won't be much time after you summon them in Pocket Plane.
I don't know about Dorn, though. Never had him for long, to evil for my taste.
Edit: @Corvino 's workaround is good... However it doesn't let you use a little exploit I would occasionally use where you swap in a custom built character for a particular battle... Berserker vs Kangaxx or an Inquisitor vs any particularly tough Mage... It's straight cheating, but it really helped when I was still fairly noobish.