Heavy-duty coolers are expensive. They're also really heavy and unwieldy. If you can find one with wheels, great. If you can find one with wheels that's also on sale, you should jump on it.
Right now, you can grab a Pelican 80QT Wheeled Elite Cooler before the summer is up for only $374.99 -- 25% off its original price of $499.99. This deal also comes with free two-day shipping, so you can be ready for your next big trip!