I have had two different northstar campers.
Yes they are heaver than 4wc.
Yes you need to upgrade ,at least air bags, springs or both.
Yes you need to use frame mounted system to secure and also add blockage
between camper and truck bed to keep camper from shifting.
Yes you have to change your driving habits, but you should with any camper
because of added weight.
Yes it has some great features that 4wc does not have, full size mattress that, better ventilation,
a nice grey water tank,17 gal fresh water, great under bed storage.
Yes the roof is stronger for mounting rack for kayak's etc.
Yes comes pre wired so you can charge camper battery while driving (if your truck has the large connector)
my 2020 tacoma does.
Yes a good idea to up grade tire rating.
I have had a 4wcamper in the past went with Northstar next time sold it went with another rig for awhile,
then went back to another Northstar.Have gone another direction now, but have no problem with another Northstar.
Rides great on the road, have gone everywhere that i have gone with 4wc,including Baja,Saline Valley,etc.
The newer Nothstare use a electric lift for top, both of mine were manual.whitch i prefer.
So in my view i have no regrets,
Les,lqhikers