The usual suggestion for camping tools like sheath knives, wood axes and the rest is that they stay in your camp, and are put away out of sight when you are not using them.
Having your own cup or tankard is great though, even prior to current arrangements, since larper flu is a thing much like fresher flu. Having your own set of cutlery is useful sometimes, depending on what you plan to eat, plenty of the for sale stuff is finger food or comes with recyclable cutlery, although there are discounts for bringing your own with some caterers. Hot water for washing up would have to be self created though so do bear that in mind.
Of course if you’re planning on self catering you’ll need a certain amount of kitchen equipment anyway.