Is it worth going with a bike the week of the Mega, even if not riding the Mega?
Yup, I did that this year. Loads of great stuff, as I say, if you can read a map and have the legs for it.
Is there much else easily accessible if all the lifts arn’t open?
We never bought lift passes, just the odd single ride. Could have done the week with no passes too.
This all depends on your definition of “easily” mind. Probably not “easy” you need to read a map, guide books, do a bit of planning etc.
If it gives some idea, we weren’t just in AdH (week in les arcs doing similar too) and over 10 days riding we averaged 40k with 2000m height gain/loss everyday. That’s an average across two weeks and we did use some lifts, but never had a lift pass.
I guess unless you’re exceptionally fit that’s not “easy” but it’s not hard either, and you could always do shorter rides!
I have been to AdH before though, but then I worked it all out for myself. Saw 1 other rider off the main mega/town routes though. IMO folk were missing out mind! TBH if you have to ask the answer’s probably “no”…unless you’re already cracking out the IGN and looking.