If you mainly cook for two people or only occasionally more, I recommend the Cadac Safari Chef, rather than the larger Carri Chef. We had the latter and switched to the former to save space and because it is quicker to set up. It is more than large enough for us.
Regarding the gas point, I think the Bullfinch is a good model as it contains an auto shut-off valve when yoou disconnect.
If you get high pressure gas hose, you can buy more than 1 metre; [HI]low pressure hose is sold in restricted lengths[/HI] (I think I have that the right way round). I have a decent hose 'tail' for the Cadac so it can be sited away from the van.
With regard to the hose length I fitted a couple of inline quick release gas couplings. I keep a 2 metre length on the cadac but if I want to move it further away I have a second 2 metre length to extend it.