My sister lives in WPB, so I have experience with visiting this area. Don't let the fact that it's Palm Beach affect the amount you tip - just because it is a wealthier area, tipping should be consistent to other parts of Florida because the amount will be in proportion to the cost - e.g. restaurants in Palm Beach are going to be more expensive than restaurants in Apopka - but both servers should get $18-20 for good service. And typically, regardless of what you tip, those helping you will be grateful since there are so many people who don't tip at all. That said, like most destinations, the dollar amount/percentage you tip varies among service rendered.
Shuttle to hotel/airport $5 - they will handle your bags for you
Hotel staff, there are several people to tip in a hotel experience: reception $0; anyone handling your bags $1/bag, $3 if they bring the bags to your room; valet $2/car fetch; room service/housekeeping $2/trip to room; some people leave tips for housekeeping - I typically only do this for stays 2+ nights, and a couple dollars is fine - I leave $5 if I have actually interacted with the person
Waiters in restaurant - 18-20% for average or good service - you can leave more if your server has been amazing, less if they have that Palm Beach attitude :)
having a drink at the bar - $1/drink, $2 if upscale restaurant
if you use a curb-side check-in - $5
taxis in PB - 10% if it is not already built-in like with Uber, Lyft
That should cover tipping interactions you would have at hotels, transportation and dining