I think it would work, but what pops to mind is that it would an awful lot of pallets even to make a short pathway. If one had access to that many free pallets, it may be fun to give it a trial run. Here in Hawaii. Pallet wood loses its integrity in two years if in contact with the soil, so it wouldn't last long.
Because I have access to about five free pallets a week, I use them to make all sorts of things. Pallet grow boxes,
compost bins, chicken pens, garden work tables, mini green house foundations (that is, table top gardening with a plastic top), temporary piglet enclosures, etc. When they begin to rot, they go into the current hugelpit (though I save the sound wood for fire kindling) and make a replacement whatever.