The rest of the produce in the truck must be 37 degrees, but that will be too cold for the strawberriesand the tomatoes too.
my sons a pro and they use moving blankets that are on grommets so you can take them down and re install.
Try something insulated, like thermal blankets that maintain temperaturePut the strawberries and tomatoes in first when the truck is not yet at 37 - whatever temperature is appropriateCover them with the thermal blanket to trap the appropriately temperate air underneath itPut the rest of the produce in and let the truck cool down to 37That seems like the most logical way to do it - if you introduce the strawberries after the truck has cooled to 37, the blanket will still only maintain that temperature.
