Hi Dave,
Jon is right I have some gear which I will look at selling namely GT rods.
I have only fished the south side, Going off the rocks in south Lombok will require some work in getting there, it's quite remote and rugged, the west end of the SW peninsula will be more access friendly around the desert point surf spot, but I have only cast from an outrigger in that local, the currents around there can swallow outriggers by the way. If you really want to get at the potential good spots in the south you need a decent speed boat, these can be hired from Bali but this will blow your budget. There are operators from Sengigi too but again budget constraints. The southern spots will be entirely dependent on weather conditions and I don't think your timing will be ideal, Jon can confirm this better than I. If so you may be more limited to the gilies on the NW side as you suggest.
Feel free to PM me.
Cheers
Andy
PS regarding cold Bintangs in May, if all goes to plan I will be getting stretched a bit more at Bugatti and Marion.