Sounds like a plan! Again xP I find it adorable. I kinda want one. c: Even if it eats me.
In that case, you gonna need a few things for personal safety.
1. Silver / cold iron weapons
2. Magic harness/bridle with cross stamped on it
(Beware of kelpies with given bridle or saddle)
3. Iron-Bronze Chains of Thracian Mares
Kelpie like to eat their victim after drowning them except for victim's heart and liver.
Most of the stories involving those monster horses warn the rider not to mount them without magic bridle.
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Can't have them taking away my favorite fan here.