I did exactly as you, but for different reasons. However, I thought I was giving it up for good, so I sold everything I could find a buyer for. That meant I could virtually start over. If I had kept everything, here is what I would do. First, as has been suggested replace ALL of your batteries with either Lipo's or A123's. I imagine that you might have some planes you can't get any more. I would hate to lose one just because of an old battery. Second, if you can, convert to 2.4 ghz, do so, the new radios are a breeze to program. Yes, the frequency boards are wide open now, but there are legitimate reasons that the hobby has converted. Lastly, check over your aircraft closely for any fixes that might be needed before flying. I had stored an Ultra Stick Lite for the 5 years and the clear covering peeled off like the skin of an onion.

Lastly, welcome back to a great hobby....don't ever do that again.