Unless you deleted the characters off of your account yourself, there won't be a need to relevel. The characters will still be there when you reactivate the account. That said, 1-60 is pretty easy these days. Exp. needed lowered, exp. received from quests increased, many "Elite" quests downgraded so they are now solo-able. I had a couple of alts. which had been sitting in their low 20s for a LONG, LONG, time. They are now 55 and 67 and I'm considering starting a couple more...
“Extinction is the rule. Survival is the exception.” -- Carl Sagan