12 Week Trekking Plan – Scaling higher?

I started the 12 Week Trekking Plan this week in preparation for my second time doing Grand Canyon R2R2R. I think the general flow of the plan is going to work great given what I have access to here in Oklahoma City. That said, the overall load of the plan feels a little light given the 47 mile, 12,000 vert feel in a single day that R2R2R entails.

I feel I’ve already got a solid base – could it make sense to scale up the plan, say add 25% to all the non-strength sessions, as a method of getting a little more work leading up to the event?