IQFs are not a frozen block they are a bag of individually frozen (hence the acronym) anchovies.2nd to what most people said.
I prefer to launch in the evening overnight, and move ice in large fish bags (18”x48” 5mm). two or three trips with the hand truck while everyone else is getting ready. (Much easier to move the ice around when it comes time to packing fish holds or kill bag. Plus any unused ice will be kept clean for the drive home.). Bags get reused several years and good for tossing crab into once they get holes.
Don’t bother with IQF blocks. Half of the chovies will be blown out, and you’ll spend more time breaking down the block and melting it down. - Instead just get a live scope, into a 5gal (or 3gal) bucket with a good ice/water/salt slurry. —. You’ll have much fresher bait and something you can actually fish with. You’ll have cold hands picking them out early in the morning so bring a SS mesh scoop with a handle (straight out of the kitchen).
There was one year where they didn’t have IQFs and all they had was the frozen brick but the IQFs are back