It depents on what you plan to do. If you have loads of layers then let it dry out as much as poss then use a really good quality scraper.
I on the otherhand us wet-n-dry every year just to remove any AF left on the bottom and get a really flat finish - this is easiest to do if the boat has just been lifted as the paint is still relativly soft. It's a horrible job so I normally try to get it done as soon as poss.
It's good to see everyone is thinking about winter work already!!
True the easiest way to remove antifouling is by blasting. As mentioned a wet and dry will keep the build up at bay but if it really bad and flaking, then you will have to still consider removal.
If you HAVE to get it off use a heat gun and good mask staying down wind of the fumes.Comes off just as paint does,just a rotten angle to work unlike the top sides!
You might also like to look at the replies re the entry 'Hull stripping ' posted on the 10th. The consensus is that sanding is time consuming, hard work and messy. We have just ordered RemovAll and will be using it soon.
I tired removall a couple of years ago. It was starting to get soft by night, when I had to leave the boatyard, and was hard again when I arrived the next morning. So I would only use it if you are able to be there all the time. If you have fewer layers on there it might be different.
I have for the past couple of years used a power chisel purchased from good old Lidl for around £15. The Bosch one is about £100! You get a blunt blade about 2" wide that does the job. I have a Snap On Tools gasket scraper for the fiddly bits and my wife uses the electric Lidl's one. Yes you do at the start dig in too deep, however, you soon get into the swing of it. I noticed Lidl had them on the specials a couple of weeks ago as I was going to buy a spare one.