Is it ok to indicate in good faith a very approximate departure date, expected length of trip and list of countries when applying for reentry permit?

Is it ok to indicate in good faith a very approximate date of departure, expected length of trip and list of countries when completing Form I-131, Application for Travel Document (mirror) when applying for a reentry permit? E.g., indicating 200 days but instead staying outside the US just for 50 days, or vice versa, and/or indicating countries A and B but instead going to countries X, Y and Z.

I don’t see anything mentioned in the Instructions for Application for Travel Document (mirror).