Advice Needed...

I'm having a hard time setting up my classroom this year. I want to be excited about it, but I just can't seem to find my inspiration. I think it is hard because:

1. I don't know how many kids I have... Last I heard, I only had two students, but my principal said that could change and go up to eight. 
2. I don't know the grades of these kids... that could be anywhere from K-3. 
3. The furniture in my classroom is mismatched, and I'm having a hard time deciding what the function of it all should be. 
4. I don't know what the behavior level is of the kids I am teaching (I am a SPED teacher and will be teaching an emotional/behavioral class).
5. It appears the teacher before me was just trying to "just get through the year" which left the room in complete chaos. 

So how am I supposed to know if I should keep the desks, or switch them out for tables?
How do I even use "table groups" when I may only have 2 students?
Should I make do with the furniture that I have and try to make it work, or do I go to ikea and get some that I know will be functional and useful?
Do I set up spaces for eight kids, or do I set up spaces for the two I know I have?

I have so many questions and I am having such a difficult time. I've always LOVED setting up my classroom, and I don't know why this year seems to be different. Any advice or ideas would be much appreciated. :)

MIA!!!

I am so sorry for the lack of posts- I moved! About a month ago I moved from Hawaii to Washington, and between closing the school year, packing, moving, and getting settled, the time just disappeared! I promise I will be back soon. :)