Welcome to the world of RVing!
Many of us use regular sheets. If need be just tuck in any extra material if the pockets are really deep. A long time ago I brought two sets of regular nice sheets that were on clearance from Target. They were my favorite sheets for the longest time. Regular sheets are not a perfect fit but I have a corner bed that hides the extra material pretty well.
Iwannacamp - $25 for sheets at CW is a good price. At that price I would buy them too.
Great choice for "Living within my means" and camping for one...
2011 Salem Cruise Lite 20RBXL & 2011 Toyota Tundra Dbl Cab
Camping History: 45 Trips / 133 Nights / 3736 Miles
FRF Social Group: Campers of the West