mine usually run to a week or 2 to 3 to 4 days haven't done an extended tour as yet but anything is possible one day.
as for gear and bike i'll run this lot by you probably the best gear out there well near enough.
bike look at the thorn range of tourers i have the sherpa.
panniers ortlieb bikepacker plus and ortlieb sportpacker front panniers.
bedding /exped 7 down matt
alpkit down sleeping bag (pipedream)
thermarest compressible pillow large,
cooking/ optimus crux stove
alu pots/kettle.
tent i have two lightest one is
hilleberg akto
mountain hardware speare gt2
both great tents cant fault either.
everything i mentioned there is great quality gear will last years and problem free with a good back up service.