[AlaninSA]

We use that kind of "field kit" for every Knight of Columbus meeting (we always start with Mass). We've held Mass in our KofC hall, on the lawn by our Hall (before our annual chicken BBQ) or outside the Habitat house we're building (we build a new one each year).

...but we've never held one at the beach on a surfboard and a trash can.

:)

[Petrosius]

Although it has become common, Mass outside of a church or chapel should only be done in emergency situations.

Canon 932, § 1. — The celebration of the Eucharist is to be performed in a sacred place, unless in a particular case necessity demands otherwise; in such a case the celebration must be done in a respectable place.

The "field kit" is really intended for Masses in the field for the military, Mass in the home for someone who is ill and restricted to bed, Mass in a nursing home or prison without a proper chapel, etc. Otherwise, Mass outside of a church should be avoided. Open air Masses for the sake of novelty do not meet the demand of "necessity".