RVs stall slightly lower with ~half flap than clean. Given the high power-to-weight ratio, the extra drag of the flap I would suggest is insignificant.
So the ground roll will be lower, and (potential) initial climb angle greater. However, since RVs are such high performance, neither benefit is usually required...
I figure the quicker I'm off the ground, the less wear I'm putting on the tires
I would reckon tyre wear is 90%+ caused by (often unnecessary?) braking / cornering, not a few feet extra ground roll. And I would think offset by the extra use / wear in the flap system. As also pointed out, it is pretty hard to overstress the flaps on departure if they were never used.
Whilst we do use them out of short strips, the main benefit to me is "rough surface" where the extra few knots spent in the air does mean less wear and tear on the U/C etc and occupants
Off long/hard runways, I tend to go flapless.
Compared to the DC-9 (and other) accidents, though, I would suggest it is only a small factor in RVs, and rarely of significance.