There is no benefit to using a cambro in a BBQ comp, thats why I wonder why so many teams use them. I talk to teams that actually use it as part of their process thinking that it actually makes the meat better. Its not possible. When I go to a comp I always make a joke that every team must have a catering job and they are going to fill their cambro and send it on the road for delivery. If my pork is done at 7am or 11am it never touches a cambro, same as brisket. A pork butt will not cool down in the summer wrapped up in foil that was brought up to 205 or whatever temp you cook until. Not only that there are ways to get it hotter that would benefit your product rather than holding hot. Once again this is just my opinion, If you have to make a choice buy a cambro or a wsm or a cooker comparable in price, buy the cooker and start your big meats much later. You will be happier. Think of it like this, would you cook a steak and throw it in a cambro for a few hours? A cambro is holding not resting, resting involves temps going down not maintaining.