What I've been doing lately, is drinking my creatine before training. I wait about 20-30 mins and then drink about 40 grams of dextrose. My rationale is that creatine and dextrose have different transit times through digestion, with creatine taking longer.
The insulin spike is desirable for cellular "delivery," and taking the creatine and carbs together may cause a premature spike - before the creatine is in circulation. I don't have exact numbers for the absorption times, so this is mostly a shoot from the hip kind of thing. A couple of years ago, I discussed this method with Donkey Kong, who's done plenty of his own reading on the matter.
Anyway, this is what I've been doing with favorable results!