Full kits are best, no point saving a few pennies over the risk of another part failing! Also, test your PCV first before buying as you may not need one. To test, take the dipstick out quickly while the engine is at idle. If it tries to stall and catches itself, your PCV is fine and doesn't need replacing.
Cam follower is worth doing for peace of mind regardless really. I only did the follower but I wish I had replaced the bolts and seal using that kit you linked!
