Sounds like an ideal plan for someone with your intentions... a 2-3" lifted JK with 33s can handle its own out on the trails (esp. "mild" ones like your plan states) and the beach.
Be careful the more serious "mod bug" doesn't bite you and get you into more expensive lifts, 35s (minimum), which leads to re-gearing and other stuff, bumpers, fenders, etc.
If you have some self control though, your plan sounds great!
My only suggestion would be to get a 6-speed and/or get the best set of gears you can get in the rig to start with. The 3.xx gears just suck IMO, especially with an auto, and if you plan to tow, you want the best gear you can get. Doing it with 3.xx gears isn't going to go to well, without turning OD off, which maybe you should do anyway, I don't know b/c I don't tow. Anyway, if you can score a 6-speed with 3.73 (would be livable - much better than 3.21 but believe this combo is rare and only a more recent option) or 4.10 gears (better yet) or the automatic with 4.10 gears, you should be OK with the 33s, and your plans, including some light towing. Not sure exactly which jeeps came with 4.10 other than the Rubi, but i think there are some non-Rubi's with 4.10s to start out there - tow package option or otherwise.
Don't expect a speed demon or anything, ever, in a Jeep, but it will get around fine.