<!-- from fixya rte -->What does a copperhead snake look like - Reptile

There are 55 different kinds of snakes in Mississippi and only six are venomous, according to the post. The six venomous snakes are Eastern Diamondback Rattlesnake, Copperhead, Canebrake Rattlesnake, Pigmy Rattlesnake, Cottonmouth and Coral Snake.

If you are in the south part of the US, especially if it is around a pecan tree, would suspect it to be a copperhead. At night they like to climb trees and eat insects that also hang out around trees. They blend in very well and starting at dusk, you might want to avoid the base of trees. A rattlesnake also will climb a tree especially if they just ate a rat or something. Have had them drop down on me while walking under a tree.

rattle snakes, copperheads, water moccasins mostly

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it does not look like snake excreta, mice is a possibility. set up a trap and see if you catch something. small lizards are a possibility too.
to avoid this in future, make sure enough sunlight enters your rv.

When I lived in Georgia I watched my dog jump at a snake every morning for two or three days. I looked it up and "thought" it was a rat snake. But this snake was really vicious! Turns out, it was a poisonous copperhead snake! What I am saying is that snake identification charts are not that easy to read. However, I learned that snake behavior is important!
According to WikiHow: "Copperheads. These beauties have a similar body shape to cottonmouths but are much brighter, ranging from coppery brown to bright orange, silver-pink and peach.[2] The young have yellow tails as well.

Check out their head shape. Non-venomous snakes have a spoon-shaped rounded head and venomous snakes will have a more triangular head.
The fact that you describe the snake you saw as long might be a good sign as most of the poisonous snakes I saw in Georgia had fat bodies.

According to SRELherp.UGA: Brown snakes are small -- 6-13 in. (17-33 cm) -- snakes that are usually brown, but can be yellowish, reddish, or grayish-brown. They usually have two rows of dark spots, sometimes linked, along the back and a dark streak down the side of the head. The belly is light brown to white.

Maybe this will help you: http://www.oplin.org/snake/quick%20id/quickid.html

Take him to the vet immediately.

The kind that prolly bites. You posted in the car and truck section bud I highly doubt anyone knows the answer to this question

There are three venomous snakes in Ohio-
Northern Copperhead.
Eastern Timber Rattlesnake.
Eastern Massasuaga Rattlesnake.
These snakes feed on rodents, frogs, lizards, squirrels and
even birds. I suggest that any of the three could be a threat
to your fish.

Regards,
Dennis

Could be a common water snake or a juvenile copper.. hard to tell from the pic