
1) Account for the wind
Strong winds will make holding your camera steady difficult so take the heaviest, sturdiest tripod you have. If you're shooting in an area that has soft soil, you can drive the feet into the ground to hold it stable. If the ground is rocky, you can use a sandbag or a weighted bag to weigh it down and keep it stable. You'll also want to remember the wind when it comes to your umbrella -- use a heavy-grade umbrella that does not turn inside-out due to the wind. This can not only help with protecting your lens, it can help with the weight a bit.2) Don't forget about the rain, either
The aforementioned umbrella can help you deal with the ran but you might want to consider getting a camera rain-coat or investing in a waterproof housing if your camera isn't water resistant. If you don't have one handy, you can always make one yourself using a heavy-duty plastic bag and some duct tape (duct tape -- is there anything it can't do?)