I would SERIOUSLY rethink going this weekend.
If you do go, take some fluids (for your jeep) and both upper and lower radiator hoses.
Not trying to tell you what to do or pick a fight. If you choose to go Tip Top Mine, you will be most likely alone. If you have a break down you are on your own. You will be under 2500 ft elevation and in the thick of the hot advisory all day.
""Tip Top trail is 25.2 miles long and will take anywhere from 4-6 hours depending on how often you stop. This trail is mostly easy, but does contain a few rough spots. Be careful during periods of high rain because both the Agua Fria and Cottonwood Creek could become quickly impassable or vehicles prone to over heat during the summer heat.""
Back way to Crown King is a safer bet as you will be climbing elevation and almost with out fail is traveld daily. By the time it gets hot you will be above 5000 feet so moving slow will not put any added stress on your Jeep. Once there eat lunch and head back via Bloody Basin Rd when it is the hot part of the day, moving at speed and a flat road with stunning views as you come off the Bradshaw Mountains .
I do not think the risk is worth it this weekend with the heat we will be experiencing.
Sounds like you have the day to go 4x4'n. Head to Sedona, go to Barlows Jeep rentals buy a Book Called "Fun Trecks" go and do Broken Arrow and Solders Pass, Both a litte challenging with incredible views. Grab lunch and then play in Oak Creek. Save the long trips down here in the valley for spring fall or a group run.
Just my 2 cense. Again I am NOT trying to offend you, just an opinion from a fellow Jeeper/Arizonian