For that load, gas only if its a daily driver and your commute is less than 20 miles each way.
Insurance- I go through my insurance broker. He gets me deals on home, autos, boat, and RV. Rolls it all up into one payment.
I have a Good Sams membership because of the discounts on products I had to buy for the RV. Things like sewer hose, chocks, extension cords, fresh water hose, etc. I bought mine at my local Gander Outdoors. They had a sale and then added the discount for new Sam's Club members. I think I saved 35% off a $200 bill of sale.
National Parks- go with America the Beautiful pass. They have a variety of "membership" levels. Plus they are good for multiple Federal Government areas, National Parks, National Monuments, COE facilities, etc.
https://www.nps.gov/planyourvisit/passes.htm
I have the Access Pass and save 50% at each facility. State Parks are a different story, and subject to each states requirements.