Steering Angle Kit
Is there any particular wheel size that I need to have with using a drift kit?
No wheel size is determined by you. Bigger inside wheels and Negative ET will give more clearance to the control arms / suspension but less clearance to the chassis.
Can I use wheel spacers? / Would spacers be beneficial?
Yes you can use spacers to move the wheel out but this will also increase scrub and make the steering wheel sensitive to road unevenness.
Is there a recommended camber setting when using a drift kit?
No, camber will be set by your preferences. You start around from what you get at assembly OR what worked for others.
Many settings is involved. If you copy one setting you need to compy many to get the similar result.