Cave,
Hmmm....I was deacking yesterday & wednesday nite with a La5. I found it pretty safe. IIRC, only a couple of ping doing this for 1 and a half hours, aprox. No damage. The only real threat are the 88's. Since they are not present in Small airfileds, that's my choice unless medium & large airfields have 88's destroyed.
I approach field with 10k. I make a 90 deg. dive from the center of the field to the outside, aiming to destroy the exerior acks first. I open up about 3k/2k, break about 1k. By the time I break, I am doing aprox 500kts. TAS, and I am in ack range for less than 5 seconds. When I am in ack range I feel safer not climbing but just extending. Rolls do the egress trick.
This way I avoid ack pings consistently.
Cheers,
Pepe