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Is there a such thing as easy retracts? Or should I not bother..I fly off of grass, it that makes a difference.
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For any model from .75 or less, mechanical retracts work fine. Use a good 180* servo and you will have good retracts. If you use the lesser expensive types, be certain the metal mount side is parallel to the wing span or the plastic parts will crush. They are not stressed for the load that they get when they are placed with the chord line.

Beef up the mount and all areas around the mounting area. Tie each part to something else.

For bigger machines, pneumatics are the way to go. The current day's valves and such work very well with little problems. Build all the tanks, switches etc into the wing for a taildragger and the only thing to plug in is the servo lead.
If your system has one of those rather small alum. air tanks, use TWO tanks or more.