After conducting research on the Vineland boat ramp in Minnesota, it appears that there is limited information available online. However, based on the available sources, here is what can be determined:

The Vineland boat ramp is located on the southern shore of Lake Mille Lacs, a large lake in central Minnesota. It is situated at coordinates 46.19119263 latitude and -93.75932312 longitude.

It is reportedly a public boat ramp, which means that it is open to anyone who wishes to launch their boat. However, it is unclear whether there are any fees or permits required to use the ramp.

As for the size of the ramp, it is difficult to determine based on the limited information available. There are no specific details on the width or length of the ramp, nor are there any photos or videos that would provide a visual indication of its size.

Regarding the types of boats that are allowed on Lake Mille Lacs, it appears that there are no restrictions on the types of watercraft that are permitted to operate on the lake. However, it is important to note that certain safety regulations and boating laws may apply depending on the type of boat and the activities being undertaken on the water.

Overall, while there is limited information available about the Vineland boat ramp, it appears to be a public ramp located on Lake Mille Lacs in Minnesota. As for its size and the types of boats that are allowed on the lake, further research or contacting local authorities would be necessary to obtain more detailed information.