hey!
Now comes the hard part, the last, slow, never ending week of work before your vacation.
I would opt for the party bus over tattoo, Beth and my nieces have done both and they all say kukuu kanukoo by far. The only thing I would add is do not do either on your last night, will make plane ride home really miserable.
I am certain that I have never eaten a steak in Aruba but the prices at Promenade do not look all that unreasonable; I'm sure others on forum can give you some insight, Cindyo & Robo maybe since they stay at the Ren. Our favorite casual place is Iguana Joe's
I understand that you are trying to be economical but i think that on one of the nights that you have a car that you should check out Flying Fishbone. Just do what we do, nice breakfast (cheap everywhere),
very light lunch, and splurg on dinner. As you said, eat in a couple of nights, stock up at the Charlotte duty free shop, and you will be set.
I don't want to sound patronizing

, but keep a close eye on the charges that you put on your room, not that they will cheat you, but it can be real easy to run up a huge tab. A couple of years ago, Beth and the nieces ran up a $300 bar tab


the
first day at the Ren.
Have fun, relax, and enjoy