Ratsnakes are usually not too finicky about husbandry, and so long as you have a heat source with an 77-80F ambient and a warm side of about 85F you should be good.
Also, aspen bedding is good, tubs and tanks are also good. I don't recommend keeping more than one snake in an enclosure, no matter what the species.
I would keep humidity at a 50-60% range and you'd be set. I would see if you can do some searches for those specific species and see if they need any other heat specifications or anything else like that.
Good luck!