Finbob, most of your concerns would be dealt with by following the advice above. If you want to dive the Liberty wreck, probably best to spend a couple of nights at least in Tulamben. Diver centers that are frequently recommended on this board include Liberty Wreck Divers and Matahari. Luko mentioned a few other good dive operations in the Tulamben area in another thread in this forum. Most should be fairly close to the sea and would only be a short walk at most. Some are right on the beach.
Carrying tanks and equipment is a weird one in Tulamben. It almost seems like there is a local mafia of old ladies that you must use to carry your equipment. The dive guides aren't allowed to carry your gear even a few meters and there have been reports that you will have to pay the porter fee even if you carry all the gear yourself. Whether it is really some local mafia or just the dive centers contributing back to the local economy, I don't know. Never really asked. Just get used to the idea that these little old ladies (usually) will pile 1-2 sets of gear (BCD+tank) on their heads and just walk off merrily.
In Bali, it is probably easiest to just research where you want to dive, then pick a dive resort/center in the area. Don't try to pick a single location and use that as a base to dive all the different locations - you just waste hours stuck in traffic. Once you've had your fill of diving in that location, just move on to the next dive location/resort.
Carrying tanks and equipment is a weird one in Tulamben. It almost seems like there is a local mafia of old ladies that you must use to carry your equipment. The dive guides aren't allowed to carry your gear even a few meters and there have been reports that you will have to pay the porter fee even if you carry all the gear yourself. Whether it is really some local mafia or just the dive centers contributing back to the local economy, I don't know. Never really asked. Just get used to the idea that these little old ladies (usually) will pile 1-2 sets of gear (BCD+tank) on their heads and just walk off merrily.
In Bali, it is probably easiest to just research where you want to dive, then pick a dive resort/center in the area. Don't try to pick a single location and use that as a base to dive all the different locations - you just waste hours stuck in traffic. Once you've had your fill of diving in that location, just move on to the next dive location/resort.