I think this was discussed not too long ago. I know because I remember replying to the thread.
Anyway. I have a '99
Scamp, and I've been
lighting the fridge with a BBQ lighter since the day I got it, going on 4 years now. No problems, other than telling if and when the pilot is lit. can be very hard to see the flame in daylight. Try lighting it in the evening the first few times to gain confidence and to figure out your technique, but as you say, pressing the knob and setting a lighter to the pilot orifice, hold the knob for 30 seconds, then release should do the trick if all is working. Easy way to check it as your weekend goes on is to just hold your hand at the top of the vent panel, above where the pilot is. you should feel warm air coming out.
One caveat, the knob on my fridge is very stiff. It takes a fair amount of force to press it in (doesn't move very far), then has to be pulled out to the normal position. Perhaps this is just an idiosyncrasy on my trailer, or perhaps I should get my control knob replaced. Just wanted to point that out in case others are the same as mine.