We've only needed a 50 amp to 30 amp adapter once in our almost 15 years of RV camping. When we evacuated for Hurricane Matthew in 2016, we ended up at a State Park in Albany, GA. The only site they had available was a buddy site. One pedestal for both sites. The other camper was using the 30 amp outlet. I figured I'd use the 30 amp to 15 amp adapter I had, but the camp host offered his 50 amp to 30 amp adapter. Worked out well since we did end up using the A/C one evening.
I had planned on buying a 50 amp to 30 amp adapter, but we ended up trading in our Class C for a TT with 50 amp hookup. Since we keep it at a seasonal site, didn't see the point. However, it's probably still a good idea to have one in case something happens to the 50 amp outlet.
-Michael
