Dave, even if you are going 75 in a 35 zone, if you are asked if you know why you were pulled over, answering "no" is only a denial of knowing the cop's motivation. Every traffic stop is a choice—generally you don't get a ticket for going up to 10 miles over the limit, but in a speed trap you will, or the cop may not stop you because it's lunch time, or he only stops pretty girls.
I haven't gotten stopped since the speed limit was raised from 55.
The radar detector is a good defense measure—the cop needing to make quota that tails you through a small town will be often picked up before you can see him, for example. This doesn't work as well with a trailer because the radar detector can't see through the trailer—they do pick up radar behind you otherwise and may get some signal around the trailer on a curve. I drive slower with the trailer because it's safer, so there's not much risk of getting a ticket unless it's a cop looking for tourists to ticket and they can always claim something. In places where they take you to a local JP because you are not local, there's plenty of room for corruption. Fortunately the old JP system is disappearing. In Colorado municipalities can pass traffic ordinances locally—they are the same as state statutes—so they can prosecute them with a town judge and collect the fines for themselves. That is the temptation in Hotchkiss where they have done that (I do know the judge, but I don't know that would help).