Headed d own this week through Columbia Bridge. Will do our usual stops in Matehual and San Miguel. Checked out the RV parks in Oaxaca and Teotihuacan and comments in last month indicated they are open with good remarks. We have been using a 34' 5th wheel and a 2006 Chevie diesel but got a used 2002 Roadtrek to suppliment travel. There are just to many places in Mexico that you cannot get a 5th wheel into, notably San Cristobal de las Casas.
We have found Ioverlander to be excellent for a Class B in Newfoundland. It did give us a few great sites in Yucatan for 5th wheel but should be even better for Class B. Friends told us about excellent commercial cenotes that you could overnight for free once you had paid day costs. Really enjoyed Hacienda Santo Domingo in Izamal, which is primarily used by European Overlanders. Harald said we were the only 5th wheel they had seen in quite a while.
Reed and Elaine