It would really help us help you if we had more detail.
"Pretty big" is still nebulous. Do you know the acreage/square miles? Got a lat/lon, or lake name and state we can look at with Google earth?
Will the 4 stations have any access to AC power or internet? What's the climate like? Do you want to measure water temperature as well?
I'm doing a similar setup on a 350 acre ranch in along the central California coast with 5 Davis stations. The expertise is here, but we need more info.
Ok, it's 30 miles, by 10 miles. 137,000 acres. It's one of the biggest freshwater lakes in the country, I believe. The lake is developed all around, so power/internet wouldn't be an issue.
The climate? Well, it depends on the day. I live in WI, it was 85 yesterday, and they are calling for a high of 58 tomorrow.
I would love to use Davis stations, but I'm not sure I'll be able to get that kind of funding. Water temperature would be nice, but the lake does freeze, so anything that floats would be out.
Any other information you need to know, just ask. I enjoy the weather, but am a total noob when it comes to stations and what not.
I guess I may have posted this in the wrong forum? Could I get a mod to move it?