Bulldog activities...hmmm this could be tough. Hey, how about eating and sleeping for starters.
Watch out for tics
Take Bully med kit...Benadryl, Imodium, Pepcid or similar, Ear cleaner and Q tips, shampoo, any dog friendly antibiotic, prednisone if you have it, pain meds if you have it, antibiotic ointment, Vet wrap dressing, eye meds if you have it, peroxide to clean a wound or to induce vomiting. Think back over the past year anything you might have used to maintain or treat your Diesel with...take it!
Vet records in case of emergency, always know where the closest vet clinic and after hours vet is located and have a plan and map that you can navigate blindfolded.
Harness
Extra lead and collar
Life jacket
X-pen
Kennel
Towels
Ice packs
Portable water bottle/bowl if he hikes with you
Make sure you go no further away from camp than you can carry him back
Measure out each meal and add a couple of days worth extra
Bottles and bottles of water
Doggie dookie bags
Watch for tics
I hope there's something on this list that you haven't already thought of...
Have fun!