[/quote]SERA Cave Carnival (Is this open to all NSS members?) & Speleofest...
Should I be concerned about registering just yet? [/quote]
Most (if not all) local and regional events are open to non NSS members but a slightly higher registration fee may be charged for non members. Pre-registration will get you a small discount and ensure a banquet ticket, t-shirt, ect. and will save time when you get there but is not necessary.