That Gran Canyon course does sound pretty crazy, especially for that part of the country. Are the dates it will be open set yet? Do you have to enter a tourney or is it open to the public for a week or two around the tournament?
It's in my personal Top 5, of about 130 courses played in 24 states.
The tournament dates are set:
http://www.delsoldiscgolf.com/Throw_Down_The_Mountain.html
It's open for a couple of practice days before each weekend. I can't play the tournament this year, but considered sneaking down there anyway. There's a greens fee each day, so I feel sure you could get on the course and play---you'd be helping with the financials. Nobody's going to ask if you're registered.
The thing about The Canyon, besides being a really cool course, is that you never know if you'll ever get another chance. It was a private course that closed about 10 or 12 years ago---then has been resurrected the past few years as an annual, temporary course. One day the land will sell, so one year will be the last chance. It could be this year.
And Florida is warm and lovely that time of year.
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That said, you have plenty of choices. Everyone shouts "HERE!" because everyone thinks their locale is the best. A few places are really warm in March, but a lot of places are mild (it's mid-spring here in South Carolina). There is good, even very good, disc golf in dozens of destinations. I suspect the same is true about craft breweries.
So the questions are: (1) How warm do you need it to be? (2) How many disc golf courses do you expect to play? (3) How many craft breweries do you want to visit?
If your answers to #2 and #3 are "three will be enough", it really opens up your choices.