they are for a medium-advanced level of husbandry.
i wouldn't suggest them for someone that has never kept montanes, if you live some were that montanes naturally could thrive, cool weather/ high humidity, good sunshine.
then you might have better luck then I. i am saying that the jacksonii jacksonii are going to be a challenge
if you are not in the best geographical location.
if you do not have skills with montanes.
if you have never had a WC chameleon before
Being on Vancouver Island, though I'm not sure exactly where, Jackson's should do well for you. A lot of montane/cool forest animals do well in most of BC, but especially so on Van Isle. Dart frogs seem to thrive over here because of the humidity and barometric pressure etc.
It'd be a good decision to invest in a small cool-humidifier and a fan. If you can get one of those stand up ones that has 3 or 4 smaller fans on it which can point in different directions, to get good airflow throughout the room, then that'd be great.
You might also want to invest in an ultrasonic humidifier. I've heard VERY bad reviews about the exo-terra ones, but you can buy some on e-bay that you can then convert to put fog into several enclosures:
Alternatively you can set up a misting system (I could help you out if you need, I sell most of the supplies as I am a water-filter salesman), and as long as you have a fluorescent bulb and no basking bulb, or a very low wattage basking bulb (20w or less) then you should be fine.
A low wattage one would be a good idea, but not much heat. I'd say no more than 40w, but of course it depends how close they can get to it. If you use a 25w then they can get very close, 40w would have to be a few inches.
As for jacksonii jacksonii, I don't think there are any in Canada right now.
In my experience, the nominate Jackson's subspecies like to bask. Mine would color up very dark and bask in full sun in ambient 85F weather. They also like to get into dense vegetation on some days, too. I've been successful keeping them outdoors here where they experience seasonal fluctuations in overnight lows, sometimes close to freezing during the winter and barely 70F in the summer. When I had the Hawai'ian Jackson's, they also seemed to really like to bask and I've always used appropriately distanced 60 watt bulbs, fwiw.