I’ve never had an Angora, but I think woodstove pellets should be fine. The Weewee pads in my experience are better for lining the litter box so that it’s easier to clean. Free roam bunnies need their litter cleaned more often since they will be sharing their space with you, and you don’t want the smell to get overwhelming.

A good way to keep the pee off your bunny is to also add a layer of hay overtop. Even though my rabbit is short haired as he’s a Standard Rex (his name is  Oliver), I find it limits the amount of pee that soaks into the bottom of his feet since it just passes straight through, You may find that wood stove pellets accomplish the same thing. I’ve never used them though. Either way, hay is a good addition as you may know rabbits tend to eat where they poop, so it encourages them to go there.

Also you will probably not get rid of all the pee from your rabbit. Naturally some will get on them. It’s like if you don’t wipe when you poop. They have no hands, so they can’t wipe. If your bunny is a neat freak they will naturally clean themselves off,  but at least for a few moments their will be some pee near their tail area. Even for Oliver.

It is good to think about taking care to limit the pee regardless as I’ve heard the strength of the ammonia in their pee can sometimes burn their feet if left to sit in it, so what you want to do has a variety of benefits even if it doesn’t fully solve the original issue.

My boy is an angora cross and I keep him on woodstove pellets. It’s the litter that clings the least. I check regularly for urine on the coat, but it is rarely an issue as he washes well, and he gets groomed daily (which is when I check)
There is some issues with it leaving some dribbles here and there from where it has caught, I’m not sure if a grate would be able to help that

Personally I wouldn’t recommend fleece or puppy pads-puppy pads are fun to chew and aren’t very good for them to ingest, and long haired buns like angoras ruin fleece during moults (which can be every three months) which creates a very hairy situation. I use foam mats for mine-this way pee can be easily spotted and wiped up, and fur can be simply vacuumed!

My own buns are Polish (short-furred), but I do as @happymoon does and place a layer of hay on top of the litter (in my case, I use Carefresh paper bedding; I found out just this weekend that Walmart sells this for distinctly cheaper under another brand name so I may have to get it there from now on!). The bunnies are very good about their litterbox habits though I do found the odd small pool of pee once a week or so; I keep meaning to see if I can find a longer litterbox to give them more room… They seem to be having no trouble keeping themselves clean overall so far, but they do have yellowish fur on the bottom of their paws which is unsightly but unfortunately seems to be pretty common with litter-trained house rabbits since, even with the best will in the world and regular changing (for me, every 2 to 3 days with a thorough clean of the litterbox with white vinegar every week), they’ll end up standing on top of soiled hay and used litter for a while.

place a layer of hay on top of the litter (in my case, I use Carefresh paper bedding

A pain with long hair is that things like hay and carefresh tends to really get stuck to them-which they dont seem to mind, but it does lead them dragging half of it with them any time they get out of the litter box. It leads to a very messy lifestyle, particularly with a free roam bun. The woodstove pellets are fairly absorbent so the extra layer of hay isn’t really necessary I find.