I’m almost ready to leave NY for two months. The car has almost all of my stuff (just not the stuff that shouldn’t be waiting in a hot car). Everything fits with room to spare. I have a 1992 Jeep Cherokee with ~147,000 miles. Here’s my pack list:

In trunk (back of Cherokee)
- Long hike back pack (with tent, sleeping bag, etc.)
- Day hike back pack (currently holding hiking/camping clothes)
- Plastic bin with other camping supplies (like hatchet, knives, hammock)
- Duffle bag with normal clothes
- Little bin with cleaning supplies
- Normal car stuff (battery jumper, coolant, tools, blanket)
- Spare tire

In back seat
- Bicycle (fits across seat without front wheel)
- Camp chair
- Hiking boots, shoes

In front passenger seat
- Flat cooler
- Camera bag (on floor)
- Computer bag (on floor)

If I need to, I can put the back seat down, stand the bike up on the side, and sleep in the back.