Crossvine is native, not sure about the other two. It is best to look up things based on their scientific name, that way you are checking the exact plant.

By the way, will these vines have something to grow on in the meadow? A fence or the occasional tree?

One site that I like to use to check for native status is the USDA Plants database. You can see in the linked page for crossvine that in the upper left corner there is a field called "native status" - the "N" stands for native.

Here is a link that might be useful: Bignonia capreolata on USDA Plants database

Riverbank Grape (Vitis riparia) and Bur Cucumber (Sicyos angulatus) are native to the Great Lakes.
http://wisplants.uwsp.edu/scripts/detail.asp?SpCode=VITRIP
http://wisplants.uwsp.edu/scripts/detail.asp?SpCode=SICANG

Crossvine (Bignonia capreolata) is a native southern U.S. vine; hardiness might be an issue. Hops (Humulus spp.) can be really confusing, there are both native and non-native types. You would have to do more research on them.

When dealing with common names of plants, it is often difficult to determine if they are Native or Non-Native, as the same common name is sometimes applied to many different species. The only way to know for sure, is to use the scientific name (Genera+specific epithet) in your research for native species present in your area.
The Wetland status indicator for a given species can vary from region to region and sometimes within a region of the country. Native plants are often very adaptable to environmental conditions and can be found in wetlands and uplands within a given geographical area.
You might also be aware that some jurisdictions prohibit the sale and distribution of some vines/plants, although native to the area, because they are considered invasive and/or a noxious weed.
Here are the species listed by the USDA as native in MI:
Bignonia capreolata (Crossvine) Wetlands 67%-99% of observations.
Vitis riparia (Riverbank grape) Wetlands 67%-99%, usually toward lower end of probability.
Sicyos angulatus (Oneseed Bur cucumber) Wetlands 67%-99%, usually toward lower end of probability;
Humulus lupulus, var.? (Common hop) Upland 67%-99%, with notation citing limited data available. There are 2 varieties documented in MI, one var.(lupuloides) is native, the other var.(lupulus) is an introduction from Europe. They may have intergraded, so that identification might be difficult.
The Wetlands indicator can indicate either, a permanently wet/flooded area or a dry area that is occasionally flooded.
Good luck with your project!
Rb

As northeastwisc wrote, Crossvine is a U.S native, but probably not native to MI. I am not sure exactly how far north wild Crossvine occurs in the midwest, but in the east, Crossvine gets only about as far as Maryland, I think.

Oh, I forgot about the scientific name. *embarrassed grin* And the PLANTS info was really helpful. I hadn't noticed the native indicator. I'll just order seeds with the proper scientific name, and if the catalogue only uses the common name, maybe I can take that as a warning sign.

There won't be fences, but there are a several brushpiles and piles of wood I thought would like to have some vines over them- could make good habitat for turtles, etc. It's seasonally flooded, and I'd like to keep the piles from drifting away. Trying to avoid having to burn them.