Do whatever the heck you want to do in YOUR camper.. ;)
Who cares what everyone else does...
I have never understood why folks try to 'camp' like others do.. I 'camp' the way I want to.. You should camp the way you want to as well. ;)
But, just to say why I don't cook in my trailer, is that I enjoy the outdoors, since that's the whole reason I'm out there in the first place.. And, my rig will smell like the food I cook if it's any kind of meat or even steamed things..
Cook inside and see how it works for you.. If you like it, there you go.. If you don't, there you go.. :)
I spend as much time outside as I can when I'm 'camping', because I only get to do it a few times a year.
I see some rigs that pull in and you never see them! They push out their 3+ slides and the satellite TV goes up and that's it!
But, if that's how they 'camp', the more power to them! At least they are out and about and doing what they want to do.
Mitch