Good thread.
The fatigue and time consuming were the big issue to me. I have already asked about the time consuming for the local dive trip this board.
Here is the list what I have done to reduce the fatigue
1. stay in the shadow before/after the dive
2. Prepare and organize all gear except the wet suit, For example, put the weight into the pouch before getting the site and set up the all BC and tank if you have a enough room at your car.
3. Use the moving equipment (cart or wheeled box) as much as possible. You can be a macho man before the dive, but after the dive, you dont want to be a macho guy again.
4. Bring the same number of tanks as the log you dive per day. You dont need to move around your tank to get a refill.
5. Drink a lot of water
6. Never hurry, take it easy, and think positively.
7. Dont argue about anything with your buddy, especially with a better half. Otherwise you ruin all your trip!
8. Invest on dry suit and nitrox if it is a feasible and affordable option.
In addition, no matter what exercise you do daily, scuba diving requires a lot of other muscles that we never used on land physical exercise. So, it makes us to be more tired.
But, there is a definitely breaking point you can get over all hassles. So, dive more often!