Haloween Inflatables Q

Hi experts, need some advice on whether or not it is ok to plug 3 haloween inflatables into one socket. Did some research and this is what I saw so far:

1. The electricity used by these can vary from around 52 watts for a smaller 4-foot one, to around 85 watts for a 12-foot inflatable. 2.A typical US household socket provides approximately 1,800 watts

I have 1 12 foot and 2 6 feet ones. Going by simple math, looks like I should be able to plug in into one outdoor socket. I do have heavy duty extension cord (1/2 inch fat wire), overload protector with 3 outlets (stake thingy). This is the layout I am planning - Extension cord into the socket, overload protector into the extension cord, 3 inflatables into the overload protector.

Will this be ok or did I miss some obvious things ? Please advise.