knowledge is free. post away.
Regarding kinetik batteries: they are simply amped up starter batteries. it even says in their descriptions: more plates, tightly packed cells. That means there's plenty of lead-acid reaction and true to form they will make tons of current on demand, but i guarantee you, those things will let you down in a big way if you don't pay close attention to your charge/discharge habits. That means KEEPING the battery in a high state of charge, ESPECIALLY in cold weather.
Remember starter batteries don't handle deep cycling well at all, and the more current you get from a battery that doesn't go up in size proportionally (to accomodate thicker plates) is only going to be more susceptible to the effects of sulfation... the fact some retailers refer to it as a deep cycle battery is misleading.
Another thing to consider is the burden you're going to be placing on your alternator to keep that thing charged and maintained, particularly in addition to an existing battery. Frankly I don't see it happening. I think it's plenty telling that Kinetik offers chargers up to 120A (stupid high amount of current) to recharge their batteries with. Their smallest charger is 25A and even under the best circumstances, they're probably anticipating 4-6 hour charge times for a single battery.
It doesn't sound from your description like you have 25 amps to spare at idle/cruise conditions for the duration you'd need it.
I think your problem would be reduced significantly if not eliminated if you got a proper starting battery instead of your yellow top. Even Optima's website shows that for extended times (0-10 seconds) the Red tops can supply nearly 100 amps MORE current than the yellow top. Even an off-the shelf OEM starter battery will deliver more current than a Yellow top within just a few seconds. An extra 100 amps may be all you need.
So why would you spend $500 on an ADDITIONAL kinetik battery that's going to be more tempermental and impose a bigger load on your alternator when in all reality you could probably spend that same amount and just get a second alternator? I say spend the smart money, ditch your yellow top and get a good starter battery. if you're stuck on brands too, then get an optima red top.