Yes, crawlers can do that from time to time!
There are days when they will outshine cranks but, we usually like to throw a couple of cranks with our crawler spread. One thing I've learned over the last few years, especially early in the morning, is to run my outside boards with cranks and run them up high in the water column. Even on days when they are hitting crawlers really well, your biggest fish will be on cranks! As the morning goes on and the crawlers take off, we adjust down on our cranks.
Another thing I have played with is running a three way swivel. On one end, I tie a two foot leader and affix that to a crank bait. On the other side of the three way, I tie a leader about 1 foot shorter than my rod and affix a crawler harness. I use the crank bait to take the harness down to depth. I do this to target suspended fish. Many times they will come up and look at the crank and drill the harness. Or, one attracts them and they hit the other! It is a great tool that I am still working with but love it so far.
Kicker motors are awesome. Although I troll with my TM a ton, the kicker has become so vital that I don't know how I did it without it. It gives me the ability to target areas that would not be conducive to targeting with certain wind situations. For a good quality read (sarcasm) read the article written by Mark Martin from a couple of months ago in regards to trolling harnesses and cranks (Woods N Water). After you read it, FLUSH IT DOWN THE TOILET!!!! Following his own advice might be the reason why he has not beaten Kevin or I in the last 8 tournaments he has entered!!!
I have OCD "Obsessive Crappie Disorder"