New tank cycle with full-cured LR

[Jaybird]

I'm going to pickup a good chunk of the LR I need for my 90G tonight and am wondering how long of a cycle I should be expecting.

The live rock is fully-cured, so I'm not expecting a large ammonia spike at all. I'm pretty much expecting to see almost zero ammonia, almost zero nitrites and a steadily rising nitrate reading.

Question is: should I be running my skimmer while doing this? If it's sucking out the junk that would make ammonia it would just be defeating the purpose of the cycle, no?

Another question: if the LR is fully cured there shouldn't really be much of a cycle at all. It should be safe enough for basic inverts right away. I'm not talking LR arriving from a courrier service but basically from a holding tank at the LFS to a plastic tub to my tank at home....total trip 30 minutes.

Any input/ideas would be appreciated.