> ensure there are no obstacles or clearance issues
That's pretty important. Recently I was plotting a course from Texas to Louisiana and LA 8 would give me a straight shot to Alexandria.
The RV760 wouldn't do it, wanting to go in odd directions. I tried it in Basecamp with the same result. I tried to make it go but no go.
A check of Google Earth Street View showed the problem; the bridge over the Sabine River is about six inches lower than my air-conditioners are tall. Says so right there on the clearance signs at the bridge.
If I'd arrived at the bridge I would've had to back up on a two-lane road a very uncomfortable distance to where I could turn around.
I do like to tell the GPS where to go since DW is navigationally-disabled and I mostly use it for alerts of turns etc but it's good to have its second opinion. An ordinary car GPS or phone app would've led me straight to the bridge.