Hi Joan - this post reminds me of the time I asked an athlete if he could bring a trainer on the boat
You definitely want to do our xc intervals plan especially if there is more punchy climbing in Winter Park a la the traditional xc courses.
I haven’t seen the course profile yet… but if its heavy on the climbing - like traditional CO XC courses that go up to the top of the ski lift from the base (> 20 minute climbs) then you want to do our hill climbing plan.
Both of those can be found on our MTB plans page here:
With regards to your FIJI trip - that is rough (lol) but I’d just start your plan and factor in the 15 days. leaving 1/2 the plan beforehand and 1/2 after - line it up in your TrainingPeaks calendar around the trip. You can do the Nino’s workouts on the boat or beach!