Really investigate whether or not it is going to save you money to use taxi/car-service. We are taking an 8 day trip in September, flying into San Diego, spending four days there, then 4 days in Anaheim, flying out of John Wayne. I thought for sure that I would just use the car in San Diego and then drop it off in Anaheim our first day there and take a shuttle or something to the airport. WRONG!
I compared many different sites - Kayak, Expedia, Priceline, and discount codes I can use at the company where I work.
Across the board, the rental rate ended up being DOUBLE for me dropping off at Anaheim as opposed to dropping off at the airport. I have no idea why. I was looking at minivans since I need that size for our family. Depending on the rental company and discount, I could find a minivan for $40-$50 per day keeping it the whole week and dropping off at the airport. If I only kept it 4 days and dropped it off in Anaheim, I think the lowest rate I found was about $102 per day. Ridiculous! In the end, it was cheaper for me to keep the car the whole week and return it to the airport than it was to go carless in Anaheim and take a shuttle to the airport. Even though my return location is still different than my pick-up location, the rates were drastically different when the drop-off location was Anaheim.
I don't know whether it was the shorter time (not getting a weekly rate) that was the issue, or maybe they jack up prices for Anaheim drop-offs... not sure. But DEFINITELY do comparison shopping. I was shocked.
I'm not sure what your plan is for your trip and why you are dropping off in Anaheim, but if it is an option to drop off at the airport at the end of your trip instead, look into that.