I've got a couple of tips for fighting Ice Climbers.
One tip is that if they are in front of you and getting ready for a grab, the AAA combo comes out faster than their grab and can knock them back.
If the Climbers try spacing you with blizzard, pull out your laser and camp them back. Laser goes through blizzard and can even send their Ice Blocks back.
If IC's spam Ice blocks, you can short hop backwards and give them the Signature Bair to the face. You can also hold down your Reflector and out patience them if short hopping isn't your thing.
IC's are probably one of the few characters that Wolf can go off stage for a gimp and come back safely.
If IC's recover High, with an OverB, Prepare for Lasers and Two bairs off the stage. When they recover Low, grab the edge for a nana kill or even a bair if it can be done. Also be aware that Nana's super armor can be used to knock you off the edge.
Reflector goes a great way in separation. A High Reflector separates and leaves Nana vulnerable. Use reflector if they are behind and run to create some distance. Or use that stun time for an FTilt, fsmash or Dsmash.
Don't get caught underneath an IC's. Their Up Air is ridiculous and can tear through your Down Air or Reflector.
Basically, this is a game of camping and patience. Wolf CAN out space them using lasers(mostly), Bair, and FTilt. Keep them out of grab range and NEVER shield when they are up close. Don't be ashamed to run away and create distance at times. They have the shortest grab range in the game, use that to your advantage.
I think that's all I have for the IC's.