M&IE: Travel Expense or Meals 50%?

I traveled for 180 days for work in 2021.  I will be claiming fuel costs, tolls, accommodation, and so on at the actual expense of each item.  Rather than itemizing food, however, I hoped to use the M&IE per diem for each county I was in and the days I was there.

When reporting, am I correct to assume the entire amount needs to go in the Meals 50% category?  I have seen in some places people being told to file it as a travel expense as well.  Can I claim any amount as Meals 100% or is this ability voided when I choose to use the per diem?

 

Is my proposed plan of action acceptable as indicated above?