OK mOlly said everything
I have a little experience as I made the 2 kind of things
On BIG one on my own with 2 others, then one , then alone , very useful, full of adventures, meetings and so . IN 80 with a XT
one little one this november . Did not find riders OK for me in time . next I get some on HUBB

.
SO I took a very good operator and start for the pistes ,a lot of pistes . BUT the others were younger, much more trained, and ths days were too long . FOR ME. I quit after 3 days !
But I learn a lot, re-gain confidence on trails , enjoyed the view , the mood the trip , also the part I made alone ;
There is anoter thing .
You said you gonna make this on duo ! this is another thing .
In all cases, train
yourself , any level will not be enough

with the bike
Increase your experience .
I will say make a little trip first , full luggage, and then reconsider everything .
And also it is gonna be very expensive in any case