1. Pitching the yeast - I am going to use Lalvin ec-1118. I've read some instructions that says to simply sprinkle the yeast into the mix....and other instructions that say you need to activate/rehydrate the yeast first before adding it. Which way are you doing it in this recipe?
Lavlin ec-1118 would probably work just fine... I've been having good luck with plain bakers yeast myself... The activate/rehydrate instructions are more for "proofing" the yeast than for any other reason...
2. "Aerate for 1 hour"- Will stirring with a big spoon work? I've read some instructions saying simply stirring will produce enough oxygen for the yeast.... but other instructions recommend a fish tank bubbler (think I even read something about using a hand mixer)...
The aeration is just to help with the respiration or aerobic phase of the yeast... You need to get the wash agitated enough for additional oxygen to be introduced into the mix... Whisking, shaking, air-stone, or whatever method achieves that task is what you're shooting for... Yeast double in numbers every 1 - 3 hours during the aerobic phase... We just want to give them a bit of a head start but they will continue in the aerobic phase for a while even after either an air lock is put in place or a layer of CO2 covers the wash which keeps fresh air out...
3. "Cap and insert air lock" - Would it be ok to siphon the aerated mix into carboy and then seal it with an air lock? I ask because I bought 2 containers a big plastic pail and a glass carboy. I figured it would be waay easier to mix/aerate the ingredients in the plastic container, then transfer to the carboy to finish fermentation.
Air locks are totally optional for most washes... I use them mainly so I can check the fermentation progress by counting bubbles... You could just as easily cover the fermenters with a clean piece of cloth to keep bugs out... And, yes, you can do all of the prep work in another container and then pour it into your fermenter/carbouy... Just make sure that if you use more than one that you end up with fairly proportionate amounts of cereal/nutrient solids in each vessel...
Hope this information helps... Good luck...