quote from Ridgeromer:
"A "holt" or "holte" is also a grove of trees or a thicket, hense, all that is needed is a bottle of stout and a place to hide away with one's lover."
I doubt if that was what Seán intended.
"A bit of a hoult" is Irish slang for hugging and kissing or perhaps as Martin said for sex.
When I was young lad long long ago we liked a bit of a hoult, but the Irish girls at that time would stop well short of actually engaging in full sex. 'Twas still highly enjoyable though. :)