If you did not add anymore Baquacil to your pool, it should be real easy to kill off the remaining chemicals with bleach. You can convert now. You must have had a lot in your pool, because most people will have 0 when then open their pools after winter.

Yes, You can convert

Even if you wait to next year, you don't have to drain. Where I live I lose about 1/3 of my water due to evaporation. Yes, water evaporates under the cover. Read up on converting at the Baquacil thread.

Again, if you did not add the stuff to your pool, you can convert. You can convert even with high levels, but it will take a lot of bleach to kill the Baquacil off. It can be done and lots have done it.

After you convert, you will probably want to change out your sand as it will be gunked up with Baquacil.

Good Luck