I keep mine at the same temps as a BP. 80F on the cool side and UTH at 92F. I keep the humidity at 50-60% and all the sheds have been good. Mine also spends most of his time in the cool hide, even after eating. I feed all of my snakes every 10 days. It's good that you are using aspen. Dumerils seem to pee alot more often, so being able to spot clean will make it easier. Just make sure you check inside the hides at least every other day if not every day for urates.
You are going to notice that they have alot more stregnth than BP's do. It may be a timid feeder for a while. For the first month or so I had to just lay the F/T in the tub and leave the room for mine to eat. They are generally laid back and pretty docile but once they get settled in you can expect the feeding response of a demon...Oh, and they have a longer, harder strike than BP's so I definitely advise using feed tongs. Here is a link to a Dumerils website where you can find basic info and care. Hope it helps.
http://www.dumerilboa.com/dumeril_boa_dumeril_boa.html
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