Biggest pedalling tyres I run are 2.2, don’t really need much more IMO
My Ransom runs 2.2 Kenda Karma
My Genius will to as its a perfect Whistler tyre.. would prefer 2.2 Cortez but its NLA, Genius is currently 2.1 El Moco front, 2.1 SB8 rear.
My Spark 2.1 SB8 always
Heli drop in early July will be a go but snow riding wont be much of an issue.. if there is snow, it’ll either be the landing patch which is a 50-100m of riding (if you want to play).. any snow further down and you’ll likely be walking it anyway.. there are still lots of people that’ll walk the first few steep sections without snow.
So, don’t worry about snow when you consider tyres.
Big thing I guess is what your motivations are.. do you want to cover ground, or play about sessioning the more technical trails?
If you want to play in cut-yer-bars, kill me thrill me, the no flow zone etc then a higher volume tyre is a nice thing, however if, like you mention, you’re XC orientated, then a lower volume tyre will let you see more of Whistler’s superb trail network on the trails that would suit your riding more.
I’d recommend renting a DH bike for a bike park day to get the most out of the experience.
Flats vs SPD’s.. ride whatever you are confident on. At the end of the day, the guiding should be tailored to your level and aimed to encourage your progression, so you shouldn’t be thrown at something you’re not comfortable with.
Weather wise.. we are due a sh*t load of rain.. we need it. June has been ridiculously hot and dry so far.. this is highly unusual!
If this continues.. we’ll be back to the provincial park closures we had a few years ago.
Have a great trip though! It’ll be fun