Advice on playing casino pot limit games

A local casino here puts on cash games every day, 1-1 20bb minimum sitdown and 2-2 blinds 50bb minimum (UK pounds sterling) PL hold'em, where basically any player at the table can put on a straddle bet of double the BB to get position PF. At the 2-2 games one time apparently people kept doubling the BB blind until it reached 128 pounds, probably bigger than the average stack size. :shock: The manager mentioned that he might limit the number of times you can double to 5 after that happened... As you might imagine the action in general is pretty crazy, especially the 2-2 tables. I've only sat at the 1-1 though.

A few questions:

1. EP raises PF get called by 3+ people regularly because it's PL. With big PP, is it worthwhile to make the limp-reraise frequently?

2. There's no max buy-in. What's the minimum I should sit down with? Do I need to sit down with more than 100bb considering usually there's one or two people who ALWAYS put on the straddle?

3. What should I do if the straddle is put on to my right every time? The way they do it is, the seat to the left of the straddle is UTG. A lot of the time even if you try to double it again to 4 bb there's a good chance the initial blind raiser will bump it to 8... One time I asked to change seats so I didn't have to be UTG every damn hand.

4. How much should I value-bet good one pair hands? People are playing Q2o so often impossible-to-spot 2-pair hands win huge pots.

That's all I can think of for now.