I'm not familiar with big oak splits but I found that my big 6" to 8" thick birch takes more seasoning time.
For birch: 5" spilt & smaller are dry enough with 1 year drying time but the bigger ones burn significantly better with 2 year drying time.
Knowing oak is 2 years or longer drying time, the bigger ones may take longer to be prime burners. Maybe some oak user will chime in with oak experience.
But when they are dry, I put them in the center of the load & they burn long & well. Great for long hotter overnight burns for cold winter nights.
For this time of the year in your area, burn the smaller splits this time of the year & save those big ones for the hotter, longer overnight burns in winter.
Many burn "uglies, butts & mis-shaped" wood for early season fires (shoulder season) & save the better stuff for colder weather.
I don't use pallet wood, due to possible nails (of various metals) & chemical contamination, but having a catalytic has made me cautious.
Getting kindling isn't an issue for me, (I split up a few straight grained spruce rounds 3/4" to 1" & good to go) &
I don't use much since when I start burning I have a fire 24/7 for months & even when I empty the stove I have hot coals left to restart the new load.
That pitch pine should work great as a fire starter, burns hot & fast. Some of the big dry pine cones work great as fire starters too.
Once you learn your stove & chimney system, you'll get a good idea of the burn times & heat output & what way to load it for the results you need for the weather.
Light that baby up, sit & enjoy the heat with a big elk steak & an MGD.
Have fun