I'm growing with biotabs under the benevolent gaze of our friend @Bob's Auto'sI have used a dehydrator for Over ten year's so you are asking the right guy.
I have found that if you let the buds lose the chlorophyll then dry at 30 degree they are as good as Sun dried . If you have grown with hydro you will need well flushed flowers for a similar result.
I recommend a dryer to cut out a few days .
So basically it's 2 days in a dark and cool room to loose chlorophyl, then maybe 2 or 3 days in the dehy at 30°C - am I right ?