The safety of a VP does however regardless of event, rather it's right or wrong it's what the courts have ruled, and in the USA case law is king when it comes to interpreting and future Implementation of a law.
This would apply likely to the nominees such as Donald Trump and JD Vance due to their future as potentially head of state.
Personally I don't feel anyone should have access to your property without a warrant and just cause. But I don't enforce the rules.
Also I provided the wrong case, I was searching casetext and now I can't find the case I was looking for. Anyhow it's pretty well established. They can't go nuts, but in the immediate area they will search private property even if the owner doesn't consent. Most events however happen at designated areas where owners provide consent and are hosting the event in the first place, or it's a government controlled area.