Having raced the Y1K twice (the first ever Y1K race in 2009, and again in 2011), there was quite a load of required equipment that had to be checked in by race officials on the day before the start. I do not have my old list, or a photo of everything laid out to see. Some of the highlights: a sleeping bag rated down to 30 degrees F. A medical kit with a number of specifically required components. A change of clothing. Rain gear. Canoe flotation or a spray skirt. A portable camp stove and fuel. To be carried on your person or in your PFD: Firestarter, knife, signal mirror, whistle, emergency mylar bivy, $20US and $20CDN, a credit card, probably some other things as well I can't remember.
But the big thing for the first Y1K was 20kg (that's 44 pounds) of food per paddler. i was in a voyageur canoe with 7 paddlers, do the math. The food, if dehydrated, could not include the weight of water to make it edible. Crazy! The rationale was that it may take a week for the fastest boats to finish, two weeks for the slower boats, plus a third week before emergency extraction if needed. I home dehydrated all main meals (breakfast and dinner) for the team in the months prior to the race. If you planned to take a 50 pound bag of potatoes and dump it, you would be disqualified. Oh, and all food was required to fit into certified bear resistant hard sided containers. I ended up getting a 120 liter bear certified Yeti cooler to hold all of the carefully packaged food that just barely fit in the voyageur canoe. Since it was to be a totally unsupported race, you are not allowed to restock supplies of any kind from any source, including towns along the way (Dawson, Eagle, etc.), nor could you accept supplies from your pit crew anywhere after the race start. Only cheers and smiles with waves as you paddled by them.
We finished the Y1K in just six days having consumed only 1/4-1/3 of the food we were forced to carry. No one went hungry and no one lost any notable weight. For our next Y1K in 2011, that ridiculous food weight minimum requirement had been eliminated. I dehydrated and we carried only a ten day supply in bear vault canisters, which was still more than sufficient for our second six day trip.
Regarding the question of firearms, one team (not us) did ask the question. The answer was, if you had the required permits, the regulation, both in YT and AK was that if you killed a bear, it must be taken to the nearest official inspection station, which could be a village as much as 100 miles upstream from your then location against a 6mph river current. To my knowledge, no one has ever asked that again. The locals told us to be more afraid of moose attacks than bear attacks. Unless a bear cub is threatened, a bear most likely only wants your food. A moose on the other hand, wants to kill you outright. We saw an uncountable number of bald eagles, dozens of moose, a black wolf, and numerous bears, both black and grizzlies during our passage.
This is what our fully loaded voyageur looked like at Whitehorse race start and at our mandatory passport showing stop at Eagle AK:
The only rough water to be negotiated is at Five Finger Rapids, and then again a short distance later at Rink Rapids, which was the reason for the spray cover and flotation requirement. A number of canoes do capsize there during the YRQ (when there is a safety boat stationed there, but is not there for the Y1K) Check with the local outfitter on the best safe track through both.