you will deff need to find out if they clean on the spot, they may , for an extra fee, usually 20 to 40 bucks. Otherwise, take an ice chest, and cut out the backstraps yourself, and leave the rest for them. they will take the rest, or whatever it is you leave , to a gut pile usually.
on a pig hunt , I usually take three rigs, a scoped rifle, a semiauto, and a varmint rifle/pistol of some kind, usually my 17hmr long bbl pistol.
I take a camel back, for water. you will lose it fast, in the heat.
I take a ruck, with any extra frozen water I want, extra ammo, a couple of flash lights, some scentless, tick repelling insect spray, some hog spray. maybe a couple of hand towels, for sweat, maybe a couple of orange vests. a camera. some light 3 d cammo PJ's. Bring 2 extremely sharp knives, in case you , or someone there , will skin or backstrap.
if they don't have a rope, to drag it out for you, bring about 10 to 20 feet of rope. I also brought a bunch of leather straps, or you could bring some 550 chord, just in case. Find out if they will have Ice chests to keep your meat cold, otherwise bring at least one big ice chest, with ice. or if you just backstrap, you don't need a big ice chest, a lunch size one will do, and just a small baggie of ice. Killing a big piggie is great for pics, not so much for eating, on anything over about 60 lbs, I would just take backstrap, and say ribs. Money allways comes up as well.