If I can drop a seed or two every 2-3",
How far apart should the "rows" be?

The only mixer I've thought of is sand. Other?
Pellet lime?

I know I could just throw it...It's only money.

Can you narrow a drill that much?

clover likes lime so that would kill 2 birds with one stone, last time I spun clover on I "diluted" it with pelletized lime.

Never drilled clover but just broad casted it. You don't want it to deep.

Broadcasting is what I have done in the past also.

Soil contact 1/4" deep or less is what the instructions say for what I have planted. Broadcast on tilled soil and then compacted works.