I am preparing to tent camp for 2 nights at a women's mtn bike clinic, and I've never actually tent camped as an adult, only once in my life close to 40 years ago

I've been told to just bring the minimum, I've friends going who are packing everything they can think of and if I forget something I can lean on them...but I would like not to have to do that overly much. I also have to keep my expenses to a bare mininum. I've also no idea what I am doing

I have a tent/sleeping bag/air mattress taken care of. Friends who are loaning the tent are helping me to put it up.

I have a cooler for ice, water, beer to share, fruit, munchies/nutrition for hiking/biking.

Meeting friends for breakfast Saturday, just need to take care of food for Friday eve/Saturday lunch - all other meals will be taken care of at clinic (my session isn't until Sunday).

There is a bath house close to the campground, and while I probably don't NEED to take water, I am taken three bottles (125 ounces each). First aid kit as well and will also pick up a folding chair.

Any obvious omissions from this list? Probably silly not to have a rain poncho but I am going to be brave and not buy one