The sign for camper uses a a loose "C" or a CLAW handshape to
indicate a large object on the back of a vehicle. As with most
signs, this sign will occur in the context of a conversation and it
is likely the signer has spelled TRUCK
recently and is now indicating he/she has a "camper" on the back of
it.
Also see:
CAMP
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ASL resources by Lifeprint.com © Dr. William Vicars