Training advice while being on a hiking trip

Hey guys! I'm gonna do my first trail marathon this year in September. Very excited, 45k and 2000m up and down. I've been running for some years, did a lot of trail half marathons and some 30k ish runs, but never went for the full one. My training is going ok so far right now I guess.

Now my problem: I'm gonna go on a two week hike to the Pyrenees in France/Spain around one month before the race. It's gonna be relatively tough days with a lot of elevation gain in pretty technical alpine environment and with a heavy backpack.

Do you think I should do some training on the side, in the evenings or mornings? Like some mountain intervalls? Or better not overdo it and stay with the hiking?

Thankful for any advice, Cheers!