I just did exactly what you are describing this summer. Not hard to do. We went with floating vinyl plank flooring from Home Depot. Once carpet and staples are removed, be sure to fill any screw heads or imperfections with wood putty. Thin vinyl flooring will show these if you don’t. Our slide has Teflon skid plate that lift about 1/4” so no need for protection from scratches. Good luck!
Bob & Jill
2009 CT Coachworks Siena 35V / W22 8.1L Vortec / Ford Flex / Blue Ox Aventa / TST 507 / Scan Gauge / Even Brake / Onan 7k / F&R Sway bars / Steering Stabilizer / F&R Trac Bar / SumoSpring / Bilstein shocks / Members: FMCA, WCMC, Good Sams, RV Life