I brought my dog with me and have had no regrets (Border Collie so I can relate to the activity level).  Heat has been an issue, but I take lots of cool, sometimes half frozen water and a sun shade to the beach - I go at 5 am which means it is cooler and we don't meet many other people.


It is also important for you to keep a close eye on him to make sure he doesn't overexert himself and get overheated (difficult with a young dog).  Finding a space where he can run off leash can be difficult but doable if you're persistent and are willing to go in the early morning - practice those "come" on commands before you get here.


Another issue is housing, you have to find a place that will allow you to keep him - again, they are available but it is certainly best to find one before you arrive or as soon as possible - he won't be allowed to stay in any hotel.


As for care giving, I've been able to allow my cleaning lady to stay at my home when I go on vacation, she gets the place to herself free of charge plus a daily monetary payment,  doggie gets to stay home with someone he's familiar with.  Again, you will have to make sure this is an option for you. 


HTH