Missing gear

I'm not quite sure how this happened; but my two younger sons borrowing some of my gear is no doubt at least partially to blame.  But I find myself having to replace a few items of my backpacking gear that have somehow gone missing.  Sigh.

1. Lost my waistpack.  I'm considering ditching it entirely, though, and not replacing it.  I'll have to be a little bit more judicious with how I pack my stuff, but I think I can pull it off.
2. Lost my SteriPEN.  I actually really liked that, so that bums me out.  I'll have to replace it, I think, although I could go with iodine tablets or a filter for less money.
3. Lost (both of my) pack rain covers.  I think I'm going to ditch these too, though, and just line the inside of my pack with a plastic bag from now on.

I'm also thinking of not bringing my tarp anymore.  When I camp in more xeric climates, like most of the west, I don't really need to worry about water getting in the tent anyway.  When I camp in rainier climates, like here in Michigan, I've actually had water pool up on the tarp and soak into the tent; I don't think it actually helps keep my tent drier at all.  It does protect the bottom of the tent from the ground on which it stands, but honestly, I'm not worried about getting rips in the bottom of my tent anyway.  If I truly do ditch the waistpack, that means I really only need about $50 to get back into backpacking, replacing the gear that mysteriously went missing.

Sadly; there is no urgency around this; I won't be able to make time in my vacation schedule for a backpacking trip this year.