Search Along Route ??

We are trying to plan a camping trip. On our phones we are able to use Google Maps, specify destination and then "search along route" for campgrounds. BUT I want to do this on my laptop instead of the tiny cell phone screen. Best I can tell my laptop Google Maps for some reason does not have the "search along route" feature.

Is there a way to get the search along route on my laptop? Or is there another RV camping trip planning tool I should be using?

Thanks