I know of several that have landed their RV that they built in 49 states. I am presently planning flights to 9-states so that I can also say I have landed in 49.
The Poll assumes that you and your RV are based in the USA.
It's been 49 states for quite awhile... I'm glad I flew with Gary "Condor" Sobek to Alaska back in 2001...I have a picture of us in Fairbanks, under the fuel price sign... $3.25/gallon Rosie & Tuppergal
26 so far (3.5 years and 450 hrs). We have plans to catch the far northeast and further out hopes to do the northwest so we will be pushing 48 in the not too distant future.