Yes the draw bar is what you use, I have skidded logs up about 15 inches on the butt end with my BX if you can pull from the smaller end.
Now pulling stumps is another animal all together, remember your BX is a LITTLE tractor, you dont have a D8. How ever that being said it can be done. Head over to TS or even HF and find a good block and tackle, and you will be able to better remove stumps, just remember you have to think things through a lot more with these little guys, they will do the work it sometimes takes a little longer and some thinking, some times out of the box as they say.
For pulling saplings, again depending on how big they are, see if you can find an old wheel from a tractor trailer. Then wrap the chain around the base of the sapling and over the top of the wheel to the draw bar, 4wd low range and move off slowly taking up slack until it pulls out or slips up the trunk than back up wack the roots with an ax and pull it again.
Make sure you have good chain and a slip hook on one end, and make sure you have enough chain,, remember you can not have to much or too many chain's.
But the most important thing is to think it all through first, your little guy will get things done, just think it through first and most of all have fun
