if your only putting guages on them, they will take f.a. current so should be fine.
just carry a spare fuse incase.
also, not sure what to fuse rating is, but you could possibly use one of the larger fuses on top of the battery, bring a connection off that and put a smaller in line fuse in, therefore putting the load on one of the 20-30A fuses rather than a smaller fuse, while still protecting the circuit with a smaller 2A fuse or simelar.