Longer term stays are problems.
We volunteered with the US Army Corps of Engineers for six months in Thomaston, CT. Simply no other way for us to be able to afford a summer near my sister's oldest brother. A nice FHU spot with great internet. But we had to work every weekend from mid-April to mid-Oct.
A commercial CG less than a quarter mile from our very private spot, behind two locked gates to which we had a key, charged $1,000 per month, plus electricity, but to get that 'low' rate, required a five month seasonal contract.
It is going to take some research, and phone calls to find a good place for over a month.
After six, almost seven, years full-time, our best longer stays have been when we volunteered. Some positions can be for only a month or two, some for a season.