It is extremely easy to get a cab at SNA. It is well marked where to go and there are always cabs waiting at the taxi stand. I would not plan on ubering to the airport to get her and back unless you absolutely have to. At least last weekend (maybe because it was a holiday weekend), the Uber pricing was very high. Yesterday before tip the price was $65 to uber from the
Disneyland Hotel back to SNA.
Last Friday it was going to cost $67 to Uber from SNA to the Disneyland hotel. We grabbed a cab instead and it was either $45 or $50 I think. We almost always just grab a cab at SNA, but I always check the uber price and sometimes also the Lyft price first to see how different the prices are. They are usually pretty close to the same.