I have not used them so I cannot speak to that. What I can say is that they apparently only have 3 campers (although they look very nice/roomy). They all appear to be Travel Trailers (no Fifth Wheels).
The website has only been on line since July 2014
The contact is a GMAIL contact (as opposed to a jtcamperrentalsllc.com email)
The only reviews I could find were on THEIR site and they are having issues with that as well. The 3 reviews show up as the page is loading then it errors and they disappear. I did however capture a screen shot of it before it disappeared.
Of course they are all glowing.
My conclusion is that this is likely a small, newer business that just hasn't been around long enough. They have limited equipment (rentals) and probably have limited resources. That being said, they are probably willing to do whatever it takes to make things better and grow their business.
I think it's interesting that they basically have 3 different makes of the same style TT. (All with a "Double" bed bunk house in the back and a Queen Bed up front.)
Their rates appear to be lower then Greenburg (another Rental company in the area).
I think they (J&T) are legit, but I just think they are too new to have too much information on them. If it were me, I'd give them a chance.