Hello ppl

I want to setup a vpn between 2 obsd boxes over wireless conectivity(ad-hoc)

Few questions about security issues :

Layer 3 : isakmpd/ipsec/x509 and ssl will be used . is this enough ?
Layer 2 : What about this layer ?!?#? is wep with key rotation working?

Has someone implement WLsec/openbsd ?

any suggestions?