I use both Google Earth and Google Maps online not only to look at campsites, but to screen fuel and food stops on my route (access and parking). Probably over planning, but I was a Boy Scout and I like to be prepared!
I just tried it but I got a message that they didn't have maps down to that level.
Deen - Vancouver, WA
'02 Dutch Star 4090 (41+', triple slide)
435/1200 ISC Cummins/Banks PowerPak
'08 Honda Civic/dolly
'05 Honda Odyssey/dolly
NRA Benefactor Life Member
FMCA f47302s, Life Member: Good Sam, Newmar DP Owners Group
51st yr of RV'ing