I've never really had any caterpillar encounters (luckily!), so I don't have any advice on that.

For poison ivy, I've never had much luck with soap and water or rubbing alcohol, probably because I wait too long. My mom brought me a bottle of something called Tecnu, and I've had a lot of luck with it. There's a cleanser for skin and a liquid that you can use to wash your clothes with. I think it's made by the same people who make Calagel, another great anti-itch product that my mom used on us as kids and that I still use.

I don't have any affiliation with the company, but I love the stuff.

Stacy

When i got stung i used bactine and the pain went away very fast

Here is a link that might be useful: bactine

I had heard that for poison ivy you should just flush the area with cool water. Using plain soap allows the oil to break up into many smaller parts and make it worse. I'm sure that some of the newer products like Tecnu address that.

Unfortunately, you don't always know you've come into contact with poison ivy and that is how you get some really bad cases - you unknowingly spread the oil onto many places.

I go into the woods all the time and walk through thigh-high poison ivy. I am careful to wear gloves and not touch any exposed skin (like scratch my face). When I get home, remove all the outer clothing and gloves and throw them in the wash. They are fine after that.

One remedy that I have found for mosquito bites: rub a little liquid soap or hand lotion on the bite and it usually stops itching. At home I use Benadryl gel, but I find these other items work fine when I'm out and about or in the car.

Do you get many mosquito bites in the car?
:-0