rigid insulation/vapour barrier

So I have finally put a down deposit on a 2017 Neo round top 6x12 all aluminum trailer. Should be here by 1st week in April
now starting the planning stage, insulating the interior.
Question - what R value should I be shooting for. See most of the stuff offers a 3-5R value. is that what most folks are getting. I've read about folks complaining about the insulation squeaking from rubbing while walking around in the trailer and also when driving..Thoughts???
Any way to remedy this problem
Do most put a vapour barrier between the inside wall and studs
Thanks for the feedback and any info you can provide
Cheers
Al
Calgary
now starting the planning stage, insulating the interior.
Question - what R value should I be shooting for. See most of the stuff offers a 3-5R value. is that what most folks are getting. I've read about folks complaining about the insulation squeaking from rubbing while walking around in the trailer and also when driving..Thoughts???
Any way to remedy this problem
Do most put a vapour barrier between the inside wall and studs
Thanks for the feedback and any info you can provide
Cheers
Al
Calgary