During the pre-spawn, how do you choose between a lipless and a squarebill? Is it simply the type of cover you're fishing? Do any other factors come into play? Thanks!

Different tools for different jobs.

I like lipless baits until the water gets into the low-mid 50's and the cover is grass.I like to reel it fast enough to "tick" the top of the grass, kill it, then rip it out............or fish it through the grass with a stop and go, or a yo-yo retrieve. Once the water warms a little and the grass gets up off the bottom a couple more feet, I switch to a squarebill...........I like wind it into the grass, kill it, let float away, and start cranking again.......if it won't float up and off the grass, I'll give it a sharp rip as well.

Wood cover............no matter the water temp or time of year I use a squarebill. I have used lipless bait in and around wood, and they work well...........but get hung up way more, and are not as efficient at coming through the wood. I don't even bother with them around wood anymore.

Lots of wood here too. Sure way to hang up quickly with lipless 

.   Perhaps over a long point out in the open I might use one.