I agree with Ron (above post). Lots of things to consider before surgery. Very often dogs will do OK without surgery.
Almost all dogs will get degenerative arthritis in the affected knee even with surgery, but the surgery will usually delay onset.
Not all surgical procedures are the same, TPLO vs Lateral imbrication vs fabellar suture and not all surgeons are of equal competence with the various procedures.
I would have been tempted to go on the camping trip if pain level was reasonable and getting in and out of RV wasn't an issue.
Doug, DVM