Anyone who's principal interests lie in rural activities - whether that be farming, fishing, forestry or fieldsports - should be voting IN.
The UK is a largely urban nation with an urban minded government. Most Britons couldn't care less where their food comes from, and most do not want to see firearms in private ownership. These are the people who our government will bend over backwards to please.
Mainland Europe has a significant "peasant" population, who's vote actually counts. Also more cultural acceptance of hunting etc. Without the steadying hand of the European rural vote we'd be stuffed in this country as far as rural activities go. When the French farmers make a fuss something gets done. When the UK farmers make a fuss a policeman comes along and says "naughty boys, go home", so they apologise and go. Nothing gets done.
The problem doesn't lie in the fact that laws are made in Brussels. The problem lies in the way our government applies them - up to the maximum, and then some.
On the continent they do things rather better - apply the rules to the minimum level and leave plenty of loopholes. They must be laughing at us the whole time! Why does our government insist on gold plating everything? It's not an mentality that'll change if we exit. Anyone who thinks there'll be a big bonfire of burdensome legislation is in cloud cuckoo land I'm afraid.
Instead we'll have even more daft legislation if we leave - firstly we'll still have to comply with all the EU rules in order to keep trading, yet we'll have no say in the making of those rules (which would be a stupid position to put ourselves in). Secondly we'll have all our own government's new rules which they'll introduce just because they can.
Ok, so there may well be issues relating to immigration, jobs, housing, social security etc etc that some people think might be cured by us leaving the EU - I don't know enough about these things to pass judgement, and to be honest they don't particularly interest me. From the purely rural pursuits perspective there's only one sensible option - stay in.