Three ways:
Southern traditional. Olive Oil, Salt and pepper. Always toss a hand full of salt on the scored skin when I flip it to crisp up the skin nice.
Mojo:
Sour Orange
Cumin
Salt and Pepper
Red Pepper Flakes
Garlic
I don't have measurements because I've been doing it by feeling so long I just do it. But I put it all in a 1/2 gallon bottle about a week before the roast so it gets all good and mixed up. I run it in a bender to get all the bits and pieces cut down as small as possible.
I take it and run about 1/4 of it through a fine sive and take just the juice and inject the meat, then put the rest in a bag all over the pig for a night or two in the cooler as the pig thaws.
The second is Huli Huli:
2 cup ketchup
3 cup soy sauce
1.5 cup brown sugar
1.5 cup honey
1.5 cup sherry
6 Tbsp. sesame oil
6. inch piece ginger root, grated
15 cloves garlic, grated
3 TBS Worchestershire sauce or to taste
Sriracha or Asian chili paste (or red pepper flakes) to taste
Juice of 2 lemons
Blend all of this up in. a sauce pan and heat it until combined a couple of days before the pig arrives, let it sit and combine. When the pig gets there slather it and inject it the night before. I toss some pineapples in with the pig when I cook it this way. Still salt and crisp the pig skin the same way with all of them.
As for the tailgate it's not a big deal. Just put all of the bags of charcoal in the Caja China with the arms, the pigs usually come frozen, so the problem isn't keeping it cool, it's getting it thawed before the event. It usually comes in a big plastic bag, just toss that in a 100 quart cooler with anything else that needs cooled, only ice it if you know it's thawed.
The problem with tailgates is having access to enough water to get the damn thing clean and having a place to dump all the grease if you're not making gravy. And let me tell you the fat from a pig makes A LOT of gravy. It has a drip pan that will have about 2 gallons of dripping in it.
Bring about 5 x 5 gallon water jugs and some scrub brushes and dish soap to clean the contraption up, otherwise if you bring it in an SUV it will never smell the same again.
