I thought about using a golf-cart for this job, but then found these on Amazon :
I love it! The roof is removable, and the whole thing packs down to fit in the van or trailer. I might upgrade those wheels to something with air in at some point, but this will definitely help taking models across some of the fields and footpaths when yomping bloody great big airframes. Trust me, a 40lb A10 hurts your back, and a 1/4 scale ASK18 is ungainly.