If you have a twist lock that dogbone one will work.If it is not then a dogbone
Like This is what you need.Do Not use a puck one like this quoted below, they will over heat and melt,I know from experience........you want a good heavy dogbone type and a good extension cord like I referenced before.
Homeless by Choice wrote:
That is for a Twist Lok connector. Your RV needs one like this Straight 30 amp female to standard 15 amp male
The one you suggested won't work. Many Walmarts have the correct type of adapter but they could be of a different manufacturer. Any of them will work.
Merry Christmas,
LeRoy