so what your sayin is ditch the fused terminal and in its place run a 30 amp circut breaker close by in line ??????
If the fuse is part of the terminal that connects to the battery and that's the thing that is causing you so much grief, then yes it's a good solution.
Thermal circuit breakers like the 30A ones I have will heat up when too much current passes through them (sometimes a fair bit more than you'd want) and they will open up, breaking the connection and removing power from the fault. As they cool, they close again and if the fault still exists they will simply go open circuit again.
That's good in one way: you don't need to carry fuses. However, if this is a permanent "on" cable (doesn't matter if the engine is running or not) a fault in the cable could cause the battery to drain. A fuse prevents that, because once it blows, it's all over until you change the fuse.
Of course, you can always put an "ignition on" relay in, so that when the ignition is turned on, the relay activates and then allows power to flow through to the back (this is how mine works). This prevents any power drain while you're not there.