Well... now that you mention it, Denise.... I did seem to seriously start losing my hair right after we joined DVC... never made that correlation before, but given my current condition, I might should contact an attorney.
From experience, I can tell you that the H2O products work well on gray hair, too, leaving the lustrous locks looking like strands of shimmering silver.
Some of us are quite proud of our "pigment deficiency."
Man, I wish I could go with the silver!! But, my dd has a stroke everytime I mention I'm thinking of stopping the coloring. Oh well, she's only 14 and doesn't want to have the only silver headed mom...even though I have about 20 years on most of the other moms.
In any case.....I haven't noticed any difference in my color while at WDW. I do wear a hat when outside though. And I do try to wet my head down before hitting the pool (wet hair is much less absorbant than dry hair). And since my hair is colored a nice red, with some summery golden glints, I like to be as careful as possible. The H2O products are wonderful. I actually bought some of the marine line after cruising.
Brown hair here, I would say that the sun does much more damage, but I buy the cheapest shampoo and conditioner for colored hair for the trip. It doesn't alway work out but I try to get hair appt scheduled for when I come back {soon afterwards}.
I get my hair colored every 4 - 5 weeks. I can't stand that 1/8 of an inch of white. I started going white at 20. I used Suave Paul Mitchell knock off, and since they stopped making that - I use BJ's knock off of Matrix. I have no troubles with the cheap shampoo. But I do make sure I condition every day. I agree with the hard water problem in Florida - hair is very limp.
natural Dirty Blonde hair here... I used the disney shampoo but used my own leave in conditioner and smoothing hairspray (for the humidity). after a week in disney with the blazing sun and chlorinated water my hair is naturally highlighted, and i get compliments and people asking me where i got my new highlights
I have brown/auburn hair that I color the greys in.
I have never tried the Mouse supplies, I always take my own toiletries due to eczema/allergies. I once got hives all over my hands after using the dispenser soap in an Epcot bathroom, so I even carry a tiny bottle of hand soap. I have a child with skin problems too so we are "free" everything + special lotions.
But I find the chlorine in the pools really strips my hair worse than any shampoo I've ever tried. I just accept that having my color fade a bit is part of the price of a nice vacation.