Running a trail marathon 2 months before a 50 miler: yay or nay?

Hi!

I have a goal trail 50 miler planned and there is a nice trail marathon that is almost exactly 2 months before this goal race. The d+ of the marathon is half of the 50 miler.

Would it be more beneficial to run it or to skip it in your opinion?

The pros I see:

• good practice for fueling (I haven't done long races in a while)
• a way to do a long supported run

The cons:

• need to taper and recover= loss of training time
• if I find it hard, it may crush my soul
• risk of injury

One possible option would be to volunteer to close the course (longer time on my feet, but less risk of injury)

What are your thoughts?