Alright, well I went and decarbed anyway. Followed BadKitty's tutorial.
Pre-heat your oven to 215 - 220 f... if you've never tested the heat of your oven, go for 210 - 215 f to be on the safe side. Decarboxylation is part of the natural aging process of canna, and decarboxylated material is somewhat fragile, because it's just a step before the material begins to actually lose the potency we're looking for as the cannabinoids continue to convert. Dry warm air is important for fast decarboxylation, but it's also a good way to quickly degrade your material by speeding up the rate of decomposition. The decarbing process continues in oil (picture how a wet potato, evaporates into a dry, but oily chip); so you're best off under-processing than over-processing, where the dry pre-decarb is concerned. Unfortunately there is a lot of discrepancy on decarboxylation. If you have freshly harvested wet cannabis, it's going to take several hours for it to first become smoke-dry, then decarb and activate. If you feel your material is very fresh, but smoke dry, feel free to experiment by adding an extra 10 - 15 minutes. If it's very old, a faded, more pale shade of green or brown, and you feel it may have crossed a border or two to get to your home, keep to the guide and do not exceed 20 minutes.
Grind your herb as finely as possible. Sprinkle evenly over the pie dish.
Cover WELL with aluminum foil, crimping up the sides below the edge and trying to avoid folding it under the dish itself (a little movement or sliding into the oven disturbs the seal and usually causes that base foil to 'lift' open.. if you seal it up around the edges instead it stays in place).
Place in oven at 220 f, for 20 - 30 minutes (less for commercial, brown or older looking herb, more for something that seems like it may be more fresh). Once your timer has gone off, shut off heat and leave the dish in the oven, open slightly (the door has a few 'open' settings... just open it a crack) and remove in 10 minutes. Letting it cool down slowly gently continues the decarbing process, while allowing any potential vapor to settle back into the material you'll be working with.
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Finished decarbing and now she's in the crock-pot..