Whether you go with two or three boards is up to you. 7" will be easier to resaw than 10".

Regarding the bar, if your saw is properly tuned then you only need the fence. If it's not, scribe a line and use the bar. Be sure to keep the board flat against either so you get pieces with parallel faces.

 

As Rich said, if your saw is lucky enough to have zero drift then you won't need the board. If the saw is tuned well then 10" should be no problem but 7 should be easier to handle.

The bandsaw in my estimation is the hardest tool in the shop to tune so don't get discouraged if it takes a lot of dialing in to get it right. Have you watched the Alex Snodgrass video?

 

Good options above, I'll offer a different one just for variety:

22" wide stock is pretty expensive these days, and a 30" bookmatched table top is an impressive sight to see.
Consider taking it to a mill that has a bandsaw with the capacity to re-saw a 22" wide board. It'll cost an hour or two of shop time, which won't be a fortune, and you'll get a very unique result.

 

The Highland Woodworking Woodslicer is an excellent resaw blade and will yield great results as long as it is still sharp AND clean. It seems to dull a little more quickly than other blades I have used but while sharp gives some of the cleanest cuts. If you have never resawn anything that wide, you might not want something you have one shot at as your first attempt but as long as the saw is up to it and you take your time and don't try to force it through, the blade will handle the 10" cut. I have personally had better luck using a fence than a bar but I would practice on something else first to see which method works better for you and your saw.

 

Thanks for the input. The guy who sold me the slab of black oak, offered to mill it as Mitch suggested. My planer cannot handle something that wide however.. I was going to bookmatch the pieces I milled whether 7 or 10 inches. I think that would be a nice touch..

 

The Highland Woodworking Woodslicer is an excellent resaw blade and will yield great results as long as it is still sharp AND clean. It seems to dull a little more quickly than other blades I have used but while sharp gives some of the cleanest cuts. If you have never resawn anything that wide, you might not want something you have one shot at as your first attempt but as long as the saw is up to it and you take your time and don t try to force it through, the blade will handle the 10" cut. I have personally had better luck using a fence than a bar but I would practice on something else first to see which method works better for you and your saw.

- Lazyman

I used a Wood Slicer before converting to a 12" riser setup and went with the Timberwolf 3tpi blade. It is also an excellent choice. Sawed a full 12" plank with difficulty but a 10" was fairly easy. Rip to smaller pieces if your plank has twists or cups.