Let me summerize for you. There are two camps on CF.
One will tell you to get a lawyer no matter what. Their argument is to make the state prove their case, regardless of whether your innocent or not. In other words, if you can get by with it, do it.
In the other camp you have those who think if you are guilty you should man up (or woman up) and accept responsibility for your actions. This group seems to think that the police can't make mistakes and you really shouldn't fight anything.
Personally I probably side more with the second group, but not completely. I have worked in and around law enforcement enough to know that: a) people who man up and accept responsibility almost always gets more favorable sentence from the judge then if they fight and are still found guilty, b) police make mistakes (my wife has been pulled over 3 times for DUI and she doesn't drink, one time the officer pulled her over just because another motorist called her in as a DUI for crossing the fog line on a mountain road- by law the officer has to see it for himself and can not pull a car over just because someone called 911).
The last thing to think about is cost. Do you want to spend or have the money to spend on a lawyer if your guilty? You may end up eating that money and a harsher sentence. Use your head and no when to cut your loses or those loses may keep growing.