Welcome to our forum.
Your tub has pilows/head rests already, and your digital topside controller will monitor the temp. The Grand Cayman has ample space for your drinks but if you were to get a tray, floating isn't recommended in my opinion as the water will have such movement that the floater will not be stable long term, unless you're using sippy cups If you are looking for a tray, look for something that either attaches directly to the cabinet or sits on the shell. There are oodles of side trays on the market and I have zero preference other than non-floating.Seat boosters are entirely up to you, or rather, up to whether or not you are tall enough. A vac is probably not necessary. But let a month or so pass and see if it may be needed. Other than the suggestions by bud16415, all I could think about is possibly getting a warm robe for winter (and maybe sandals/flip flops) and possibly scented granuals. I sell Spazazz but most granulated smelly stuff seems to be the same. Hope this helps. Good luck moving forward.
That's a sweet setup. Is the surround sold by Bullfrog spas?
Scumbag, spa vac
Thermometer? vacuum?I have an artesian grand caymen install in March