I usually leave mine in primary for 3 weeks, to let the yeast work and wort to settle
You’ll find no real need to secondary unless you need the fermenter freed up for another batch
The only difference I’ve found between carb drops, priming sugar and domino dots is cost, dots being cheapest
Stay away from the carb tabs, the ones that look like little tan hockey pucks
If you’re boiling 3 gallons for a 5 gallon batch
You can do in immersion chillier to get it down and then empty a 10 gallon bag of ice into fermenter and pour your cooled wort on top of that should give you close to 5 gallons. Keep a gallon or 2 of cold water handy to top off
Of course this...
I find that 3 weeks or so in primary is sufficient time before bottling or kegging. Of course there are some styles that require more time
Anything shorter than 3 weeks may be too early to package, but this is in Central Texas and what works for me