I guess our "vehicle" was the A-Star helicopter. We also used an ATV but that was limited to travel on the ice-covered Lake Hoare. Back in the 1960s, they did drive in to Lake Vanda on a track-vehicle. After 50 years, you can still see the tracks. This is a very fragile environment. In fact, we had "pee bottles". I had 2 1-liter nalgene bottles that I packed around with me. When I had to go, I peed into the nalgene bottles. (Don't want to mix up your pee bottle with your water bottle
.) Remember the first sign of hypothermia is that you have to pee. Your body wants to get rid of whatever liquids it doesn't need to keep warm. Later the pee bottles were emptied into a 55 gallon drum. The drum over-wintered in Antarctica so that the pee froze and then it was shipped back to the US for processing. When I was there, there wasn't a waste treatment facility at McMurdo station although there was plans to build one.
If you had to poop, then you used the "rocket toilets" back at camp. These toilets had a propane burner attached that burned up all the waste. Anyways. Keeping the area pristine was a major concern.